WO2017118035A1 - 导光部件、背光模组、显示装置 - Google Patents

导光部件、背光模组、显示装置 Download PDF

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Publication number
WO2017118035A1
WO2017118035A1 PCT/CN2016/095959 CN2016095959W WO2017118035A1 WO 2017118035 A1 WO2017118035 A1 WO 2017118035A1 CN 2016095959 W CN2016095959 W CN 2016095959W WO 2017118035 A1 WO2017118035 A1 WO 2017118035A1
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WO
WIPO (PCT)
Prior art keywords
light guiding
backlight module
light
guiding member
metal
Prior art date
Application number
PCT/CN2016/095959
Other languages
English (en)
French (fr)
Inventor
夏小丽
裴效增
Original Assignee
京东方科技集团股份有限公司
京东方光科技有限公司
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 京东方科技集团股份有限公司, 京东方光科技有限公司 filed Critical 京东方科技集团股份有限公司
Priority to EP16843281.3A priority Critical patent/EP3401714B1/en
Priority to US15/512,513 priority patent/US10473978B2/en
Publication of WO2017118035A1 publication Critical patent/WO2017118035A1/zh

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Classifications

    • 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
    • G02F1/133611—Direct backlight including means for improving the brightness uniformity
    • 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
    • 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
    • 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
    • G02B6/0025—Diffusing sheet or layer; Prismatic 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
    • G02B6/0065—Manufacturing aspects; Material aspects
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
    • G02B6/0086—Positioning aspects
    • G02B6/0088—Positioning aspects of the light guide or other optical sheets in the package
    • 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
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • 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 present invention relates to the field of display technologies, and in particular, to a light guiding member, a backlight module, and a display device including the same.
  • a backlight module needs to be made thinner to take up as little space as possible.
  • components such as plastic frames in the backlight module are generally designed to be thinner and narrower.
  • a thin plastic frame is easily softened, causing troubles in the use and maintenance of the backlight module, and affecting the mechanical strength of the backlight template.
  • some backlight modules are also provided with a backplane structure. However, it is not suitable to add a backplane structure and a thinning requirement of the backlight module.
  • the proposed light guiding member for a backlight module includes an integral metal component and a light guiding component, and at least a portion of at least one side of the light guiding component is configured to receive light emitted by the light source to generate A backlight, the metal element surrounding a side of the light guiding element that is not used to receive light from the light source.
  • the light guide member provided by the embodiment of the present invention since the metal element and the light guiding element can be integrally formed, when applied to the backlight module, it has a large mechanical strength to support each component thereon, and the metal The component also prevents light leakage from the light guiding element. Therefore, the light guide member provided by the embodiment of the present invention can eliminate the plastic frame and the back plate, so that the problems of the conventional backlight module including the plastic frame or the back plate can be alleviated or eliminated. The overall mechanical strength of the backlight module can be ensured, the thickness of the backlight module can be reduced, the thinning requirements of the display device can be met, and the production and maintenance cost of the backlight module can be reduced.
  • the metal component includes at least one aperture that penetrates at least a surface of the metal component proximate the lightguide component, the aperture being filled with a material that forms the lightguide component.
  • a hole may be a through hole that completely penetrates the metal member, or may be a blind hole that penetrates only the inner surface of the metal member. Since the material of the light guiding member surrounded by the metal member is also filled into the hole of the metal member, the bonding between the metal member and the light guiding member can be enhanced by the hole.
  • such a hole may be a tapered hole.
  • the tapered bore can provide a stronger bond between the metal component and the light guiding component.
  • the light directing component can further include an opaque element for covering the aperture. Providing an opaque element can further alleviate or eliminate light leakage that may be caused by the aperture.
  • the opaque element comprises an ink coating or an opaque tape.
  • the face of the metal element in contact with the light directing element is at least partially a rough surface. It can be understood that the rough surface can provide a stronger bonding force between the metal component and the light guiding component, thereby improving the firmness of the bonding of the metal component and the light guiding component.
  • the metal component includes a first portion and a second portion joined together, the first portion surrounding a side of the light guiding element that is not used to receive light from the light source, the second portion Embedding the light guiding element at an angle to the first portion.
  • the metal component can be contacted not only by the first portion with the side of the light guiding element, but also by its second portion with the other surface of the light guiding element (eg, the front surface or the lower surface) Surface) contact, thereby promoting the firmness of the combination of the light guiding element and the metal element.
  • At least one of the two ends of the metal element is embedded in the light guiding element.
  • Another embodiment of the present invention further provides a backlight module without a backboard and a plastic frame, the backlight module including a light source, and a light guiding member provided by any of the foregoing embodiments.
  • the backlight module further includes an optical element disposed above the light guiding member.
  • the light guiding element comprises a raised structure perpendicular to its upper surface for carrying the optical element.
  • the raised structure includes a first step and a third for carrying different optical components Two steps.
  • a further embodiment of the present invention provides a display device, which may include a backlight module as provided in any of the foregoing embodiments.
  • a display device may be any display device that requires a backlight module as a backlight, including but not limited to any LCD display, television, mobile phone, personal digital assistant, tablet, notebook computer, desktop computer, etc. device.
  • the light guiding component provided by each embodiment of the present invention can be applied to a backlight module, so that the backlight module can eliminate the plastic frame and the back plate, thereby reducing or eliminating the existence of a conventional backlight module including a plastic frame or a back plate.
  • the problem can also ensure the overall mechanical strength of the backlight module, reduce the thickness of the backlight module, meet the requirements of thinning the display device, and reduce the production and maintenance costs of the backlight module.
  • Figure 1 schematically illustrates a top view of a light directing member and its external light source, in accordance with one embodiment of the present invention
  • Figure 2 is a view schematically showing a hole of a metal member in a light guiding member according to another embodiment of the present invention
  • FIG. 3 is a view schematically showing a rough surface of a metal member in contact with a light guiding member in a light guiding member according to another embodiment of the present invention
  • Figure 4 is a schematic cross-sectional view of the light directing member 20 of Figure 1 taken along the dashed line A-A, in accordance with one embodiment of the present invention
  • Figure 5 is a schematic partial plan view of a light guiding member according to another embodiment of the present invention, showing one end of a metal member in the light guiding member;
  • FIG. 6 is a view schematically showing a configuration of a backlight module according to an embodiment of the present invention.
  • FIG. 7 is a partial cross-sectional view schematically showing a backlight module according to still another embodiment of the present invention.
  • Figure 8 shows a flow chart of a method for fabricating a light directing component in accordance with one embodiment of the present invention.
  • a light guiding member includes a metal member and a light guiding member formed integrally, and the light guiding member is configured to receive light emitted from an external light source to generate a backlight.
  • Fig. 1 schematically shows a plan view of a light guiding member and an external light source according to an embodiment of the present invention.
  • the light guiding member 20 includes a metal member 201 and a light guiding member 202 formed integrally, and at least a portion of at least one side of the light guiding member 202 is configured to receive light emitted by the light source 10 to generate a backlight, and the metal member 201 A side of the light guiding element 202 that is not used to receive light from the light source 10.
  • the external light source 10 may be a light source in the backlight module. At this time, although the light source 10 is directly in contact with the light guiding member 20 in FIG.
  • the actual backlight is In the module, this is not inevitable, and an appropriate interval or gap may be allowed between the light source 10 and the light guiding member 20.
  • light emitted from the light source 10 can enter the light guiding element 202 through one side of the light guiding member 20, and the light guiding member 202 can cause the received light to be emitted from the upper surface thereof to generate a backlight. Therefore, in the example of FIG. 1, the upper surface of the light guiding element 202 is the light emitting surface of the backlight.
  • the lower surface (not shown in FIG. 1) of the light guiding element 202 may be rough, for example, the lower surface thereof may have dots or bumps for reflecting light.
  • the light emitted from the light source 10 can be emitted from the upper surface of the light guiding element 202 through the total internal reflection of the light guiding element 202 and the reflection of the dots or the uneven spots on the lower surface thereof, thereby generating a backlight.
  • Techniques for the light guiding element 202 to cause light received therefrom to be ejected from its upper surface are known to those skilled in the art and will not be described in detail herein.
  • only one light source 10 is schematically illustrated in FIG.
  • the backlight module can include any suitable one of a plurality of currently available types of light sources, including but Unlimited For linear light sources such as cold cathode fluorescent tubes (CCFLs), point sources such as light emitting diodes (LEDs), and the like.
  • linear light sources such as cold cathode fluorescent tubes (CCFLs), point sources such as light emitting diodes (LEDs), and the like.
  • the light guiding member 20 since the light guiding member 20 includes the metal member 201 and the light guiding member 202 formed integrally, the light guiding member 20 can have a large mechanical strength, which allows the backlight module to be directly disposed thereon. Components are possible.
  • a plastic frame for example, under the light guiding member
  • the plastic frame can prevent the light guiding member from leaking light, and also provide support for each component thereon.
  • the plastic frame is also designed to be thinner and thinner, and its width is also narrower and narrower, which leads to a significant decrease in the support capacity of the plastic frame and also the overall strength of the backlight module. decline.
  • such a plastic frame is soft and deformable due to the thin and narrow features, thereby increasing the difficulty in assembling the backlight module.
  • Another conventional backlight module technology is to design a backlight module with a backplane.
  • a backplane is provided to support various other components of the backlight module.
  • the backing plate is disposed below the bezel as a bottom support member, and the bezel and backing plate can be designed as a unitary structure or as separate structures.
  • the light guiding component needs to be thinner, which makes the design and development of the light guiding component more difficult, and the cost of the backlight module is improved.
  • the plastic frame and the back plate are designed as a single structure, the obtained backlight module is prone to warping due to the different shrinkage ratios of the plastic frame and the back plate.
  • the problems existing in the production and maintenance of the conventional backlight module can be alleviated or eliminated, and the backlight module can be reduced without affecting the overall mechanical strength of the backlight module.
  • the thickness satisfies the requirements for thinning of the display device.
  • the optical component 201 has a large mechanical strength to support each component thereon, and is also beneficial for enhancing the backlight module.
  • the overall mechanical strength, and the metal component 201 can also avoid light leakage of the light guiding component 202. Therefore, such a light guiding member provides the possibility of eliminating the plastic frame and the back plate in the backlight module, thereby reducing or eliminating the problems of the conventional backlight module including the plastic frame, and ensuring the backlight mode.
  • the overall mechanical strength of the group reduces the thickness of the backlight module and meets the requirements for thinning of the display device. Low production and maintenance costs.
  • the plastic frame can be eliminated, and the metal component and the light guiding component are integrally formed, the cumulative tolerance between the components in the backlight module provided by the embodiment of the present invention can be reduced compared to the conventional backlight module. Small, thereby effectively alleviating the problem of positioning deviation between the flexible circuit board (FPC) of the display device and the golden finger of the backlight module (electrically connected to the light source), facilitating the manufacture and assembly of the display device.
  • FPC flexible circuit board
  • the backlight module of the display device may have different shapes according to the display device to which it is applied, and therefore, the light guiding member 20 may have a different shape depending on the applied display device.
  • the light guiding member 20 may have a substantially rectangular shape
  • the light guiding member may have an elliptical, circular or square shape, for example.
  • Other shapes Accordingly, although FIG. 1 schematically illustrates a substantially rectangular light directing member 20, embodiments of the present invention are not limited thereto.
  • one side of the light guiding element 202 shown in FIG. 1 opposite to the light source 10 is not surrounded by the metal element 201, it can be understood that in other embodiments, the metal element 201 can also be surrounded. A portion of the side of the light guiding element 202 opposite the light source 10 may be provided with a suitable opening that can receive light emitted from the light source 10.
  • the inventors of the present patent application have proposed various solutions to make the metal member 201 and the light guiding member 202 more firmly bonded together.
  • the metal component 201 can include at least one aperture that penetrates at least a surface of the metal component 201 proximate to the light guiding component 202, the aperture being filled with a material that forms the light guiding component.
  • the light guiding element 202 is not only in contact with the surface of the metal element 201 close to the light guiding element 202, but also a part of the light guiding element 202 can be accommodated in the hole in the metal element 201, such that the metal element 201 and The bonding force between the light guiding elements 202 is enhanced by the presence of the holes, so that the two are more firmly bonded together.
  • the surface of the metal member 201 close to the light guiding member 202 may also be referred to as the inner surface of the metal member 201.
  • Fig. 2 schematically shows a hole 201a in the metal member 201.
  • the metal member 201 can include any number of such holes 201a.
  • the hole 201a may be a tapered hole, and the hole 201a of this shape may further enhance the bonding force between the metal member 201 and the light guiding member 202.
  • the hole 201a may be a through hole passing through the metal member 201, or may be a blind hole that penetrates only the inner surface of the metal member 201 without penetrating the outer surface of the metal member 201.
  • the backlight module may further include an opaque element for covering the hole 201a on the metal member 201.
  • the opaque elements include, but are not limited to, ink coatings, opaque tapes, and the like.
  • the ink coating may be formed by an inkjet process, and the opaque tape may be adhered to the metal member to cover the hole 201a, thereby alleviating or avoiding light leakage that may occur on the light guiding member 20.
  • the face of the light guiding member 20 in contact with the light guiding member 202 is at least partially a rough surface as shown in FIG. Due to such a rough surface, the bonding force between the metal member 201 and the light guiding member 202 can be enhanced, so that they are more firmly bonded together.
  • the metal component can be designed to have a particular shape to facilitate its bonding with the light guiding component 202.
  • FIG. 4 there is schematically shown a partial cross-sectional view of a light guiding member 20 according to still another embodiment of the present invention, which may be from the light guiding member 20 as shown in FIG. owned.
  • the metal component 201 includes a first portion and a second portion that are connected together, the first portion surrounding a side of the light guiding element 202 that is not used to receive light from the light source, and the second portion is embedded in the light guiding element 202 and the first portion At a certain angle.
  • FIG. 4 there is schematically shown a partial cross-sectional view of a light guiding member 20 according to still another embodiment of the present invention, which may be from the light guiding member 20 as shown in FIG. owned.
  • the metal component 201 includes a first portion and a second portion that are connected together, the first portion surrounding a side of the light guiding element 202 that is not used to receive light from the light source,
  • the first portion may be a straight portion of the metal member 201 that is tightly coupled to the side surface of the light guiding member 202, and the second portion may be embedded in the light guiding member 202, and The straight portion is a curved portion at an angle.
  • the second portion of the metal component 201 can form any suitable angle with its first portion as long as its second portion is in contact with the light guiding component 202.
  • the second portion of the metal component 201 may not be embedded in the light guiding element 202 as shown in FIG. 4, but attached to the light guiding element 202 perpendicular to the first portion of the metal component 201, the metal component 201
  • the second portion can also be embedded in the light guiding element 202 at any suitable angle to its first portion.
  • FIG. 4 illustrates the metal component 201 including two second portions embedded in the light guiding component 202, in other possible embodiments, the metal component 201 may include only one second portion.
  • At least one of the two ends of the metal element may be embedded in the light guiding element to facilitate bonding between the metal element and the light guiding element.
  • FIG. 5 therein is a partial plan view schematically showing a light guiding member 20 according to still another embodiment of the present invention, in which the metal member 201 in the light guiding member 20 is shown. One end. As shown in FIG. 5, one end of the metal member 201 is embedded in the light guiding member 202, so that the metal member 201 can be more firmly attached to the light guiding member 202. It will be understood that although not shown, the other end of the metal member 201 can be embedded in the light guiding member 202 in a similar manner.
  • any combination of the various embodiments described above with respect to light directing component 20 may be employed to further facilitate the The tight coupling of the optical element 202 and the metal element 201. That is, the light directing component 20 of other possible embodiments may have a combination of any of the various features as exhibited by the above-described embodiments.
  • the metal component 201 in the light guiding member 20 may have both a hole as shown in FIG. 2, a rough surface as shown in FIG. 3, and a first portion as shown in FIG. And the end as shown in Figure 5.
  • FIG. 6 is a schematic structural view of a backlight module having a light guiding member as described in the above embodiment.
  • the backlight module does not include a plastic frame or a back plate.
  • the backlight module in addition to the light guiding member 20 and the light source 10 described above, in this embodiment, the backlight module further includes a reflective member 30 disposed under the light guiding member 20.
  • reflective element 30 can be formed from a material having high reflectivity.
  • reflective element 30 can comprise a layer of polyethylene terephthalate (PET) and a polyester film formed thereunder. Light entering the PET layer can be reflected by the total reflection of the bubbles therein, and other light can be reflected back to the light guiding member 20 by the polyester film.
  • PET polyethylene terephthalate
  • the backlight module according to another embodiment of the present invention may further include an optical element disposed above the light guiding member.
  • These optical elements can be selectively arranged depending on the desired characteristics of the backlight to be emitted, for example, optical elements arranged to improve optical characteristics such as uniformity, brightness, etc. of the emitted backlight can be selected.
  • the selected optical element includes a diffusion film 40, an incremental film 50, 60, and a light-shielding tape 70 disposed above the light guiding member 20 in order from bottom to top.
  • the diffusion film 40 is located above and adjacent to the light guiding member 20, and the light guiding member The backlight emitted by the 20 through the diffusion film 40 can generate diffuse reflection, thereby making the light distribution more uniform, and is advantageous for uniformizing the in-plane brightness of the backlight module.
  • the diffusion film 40 may include a base layer and a diffusion layer and a protective layer respectively located above and below the base layer.
  • the base layer may be formed of a material having high light transmittance such as polyethylene terephthalate (PET), polycarbonate, or the like, and the diffusion layer and the protective layer may include a polymethyl methacrylate material.
  • the diffusion layer may include polymethyl methacrylate particles having irregular particle diameters as diffusion particles.
  • the brightness enhancing film may include a first prism 60 and a second prism 50 that are arranged one above the other. Therefore, the incremental film can be used as a concentrating device to concentrate the light emitted from the diffusion film 40 within a certain angular range by utilizing total reflection and refraction of light in the prism, thereby increasing the brightness of the emitted light.
  • a part of the light emitted from the diffusion film 40 may be directly emitted through the second prism 50 and the first prism 60, and another part of the light may be circulated between the diffusion film 40, the second prism 50, and the first prism 60 by refraction and total reflection. This cycle is not stopped until it meets the conditions ejected from the first prism 60.
  • the first prism 60 shown in FIG. 6 can capture light escaping from the second prism 50, thereby improving the light source utilization efficiency of the backlight module. Nevertheless, it will be appreciated that in other possible embodiments, only one prism may be provided.
  • the light guiding element may not be a regular structure, for example, it may include a convex structure perpendicular to its upper surface, which may be used to carry the optical element of the backlight module described above. .
  • FIG. 7 illustrates a partial cross-sectional view of a backlight module according to another embodiment of the present invention, the cross-section of which may be perpendicular to the upper surface of the backlight module.
  • the convex structure of the light guiding element 202 includes a first step for carrying the diffusion film 40, the second prism 50, the first prism 60, and a second step for carrying the light shielding tape 70.
  • various optical components can be arranged above the light guiding member in a simple and low-cost manner, which helps to simplify the structure of the backlight module and reduce the manufacturing and assembly cost of the backlight module.
  • the metal member 201 in the light guiding member 20 may be formed of any suitable metal material including, but not limited to, iron, stainless steel, etc., and the light guiding member 202. It can be formed using any suitable light transmissive material including, but not limited to, polymethyl methacrylate, cycloolefin polymers, polycarbonate, and the like.
  • the plastic frame and the back plate used in the conventional backlight module can be omitted, and the mechanical strength of the backlight module can be prevented.
  • the invention reduces or eliminates some problems existing in the conventional backlight module, and further reduces the thickness of the backlight module, satisfies the requirements of thinning the display device and narrowing the frame, and reduces the production and maintenance cost of the backlight module.
  • a display device that can include the display module provided by any of the foregoing embodiments.
  • a display device may be any display device that requires a backlight module as a backlight, and examples of the display device include, but are not limited to, an LCD display, a television, a mobile phone, a personal digital assistant, a tablet computer, a notebook computer, a desktop computer, etc.
  • An electrical device that displays functions. Since these display devices include the display modules described in any of the foregoing embodiments, they also have the features and advantages of the display modules, and are not repeated here.
  • Another embodiment of the present invention further provides a method of fabricating a light guiding member in a backlight module, the light guiding member comprising a metal element and a light guiding element formed integrally, the method may include the following steps: The shape of the display device of the backlight module determines the shape of the light guiding member; the metal component having the shape conforming to the shape of the light guiding member is formed; the metal component is placed in the corresponding injection mold, and is filled with the light component to be surrounded by the metal component Space to form a light guiding element.
  • the shape of the light guiding member is first determined according to the shape of the display device to which the backlight module is applied.
  • the shape of the light guiding member may be determined to be substantially rectangular, and for a wearable device such as a conventional watch or the like, the shape of the light guiding member may be determined to be substantially Round, square or oval, etc.
  • the shape of the light guiding member is not limited herein, which is determined according to the actual shape of the display device to be applied. Then, a metal member having a shape conforming to the shape of the light guiding member can be formed, and thus, the shape of the metal member can be determined, and the shape of the light guiding member can be substantially determined. Thereafter, in the present embodiment, the integration of the metal member and the light guiding member can be accomplished by means of an injection mold. In this implementation, The shaped metal component can be placed in a corresponding injection mold and the space enclosed by the metal component can be filled with a light transmissive material to form a light guiding component.
  • the heat-transmissive light-transmitting material can be injected into the cavity of the injection mold by high pressure, and after cooling and solidification, an integrated structure of the light guiding element and the metal element is formed.
  • the light guide member of the backlight module can be fabricated in a relatively simple and low-cost manner.
  • the light transmissive material used in the fabrication process may include, but is not limited to, any of polymethyl methacrylate, cycloolefin polymer, and polycarbonate.
  • the step of fabricating the metal component may further comprise: fabricating the metal component such that its length is smaller than the circumference of the light guiding component. Predetermining the length of the metal element and making it smaller than the circumference of the light guiding member may cause the final metal element not to completely surround the light guiding element, and thus may be a side portion for forming light guiding member for receiving light emitted from the light source be ready. Further, the step of fabricating the metal component may further include: fabricating the metal component such that it forms a non-closed curved structure having an opening such that the formed light guiding component is capable of receiving light emitted from the light source of the backlight module via the opening. It will be appreciated that the shape of such a non-closed curved structure may correspond to the shape of the determined light guiding member.
  • the step of fabricating the metal component may further include forming at least one hole for filling the light transmissive material on the metal component.
  • a hole can accommodate the material forming the light guiding element, which can enhance the bonding force between the light guiding element and the metal element, benefiting the mechanical strength of the formed light guiding member.
  • such holes may be through holes, blind holes, and may have different shapes, such as tapered holes.
  • an opaque member may be further employed to cover the formed hole.
  • an opaque element may be formed by an inkjet process, or an opaque tape may be used as an opaque component to avoid light leakage of the light guiding member.
  • the step of fabricating the metal component can further include forming a rough surface on the metal component for contacting the light guiding component.
  • the rough surface can also promote a stronger bond between the metal component and the light guiding component, benefiting the mechanical strength of the light guiding component.
  • the step of fabricating the metal component may further include: forming the first portion and the second portion of the metal component, the first portion and the second portion being coupled together, and the first portion surrounding the light guiding component not for receiving the light source The side of the light, the second part is embedded in the The light guiding element is at an angle to the first portion.
  • the step of fabricating the metal component may further include forming both ends of the metal component such that at least one of the two ends can be embedded in the formed light guiding component.
  • a light-emitting material when fabricating the light guiding component in the backlight module, may be used to form a convex structure perpendicular to the upper surface of the light guiding component for carrying the optical component in the backlight module.

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Abstract

一种用于背光模组的导光部件（20），其包括一体的金属元件（201）和导光元件（202），导光元件（202）的至少一侧面地至少一部分用于接收从光源（10）发射的光以生成背光，金属元件（201）围绕导光元件（202）的不用于接收光源（10）的光的侧面。这样，背光模组可以省去胶框、背板等结构，同时还能保证背光模组整体的机械强度，降低背光模组的厚度，满足显示装置薄化的要求，并降低生产和维护成本。

Description

导光部件、背光模组、显示装置 技术领域
本发明涉及显示技术领域，特别是涉及一种导光部件、背光模组、以及包括这样的背光模组的显示装置。
背景技术
随着科技的发展，市场对各类显示装置的要求越来越高。例如，超薄、窄边框等已经成为众多显示设备所追求的目标。为了实现这些目标，通常需要对显示设备的相关部件进行改进设计。例如，背光模组需要被制作得更薄以尽可能占用小的空间。为此，背光模组中的胶框等元件通常被设计得更薄、且更窄。然而，这种较薄的胶框很容易变软，给背光模组的使用和维护带来了麻烦，同时影响了背光模板的机械强度。为克服这一缺陷，有些背光模组还设置有背板结构，然而，增添一个背板结构与背光模组的薄化要求又是不适应的。
发明内容
本发明的实施例的一个目的是提出一种改进的导光部件以及包括这样的导光部件的背光模组和显示装置，以促进显示装置的薄化，并能减轻或避免以上所提及的问题中的至少一些。
在本发明的各实施例中，所提出的用于背光模组的导光部件包括一体的金属元件和导光元件，导光元件的至少一侧面的至少一部分用于接收光源发射的光以生成背光，金属元件围绕所述导光元件的不用于接收光源的光的侧面。
对于本发明实施例提供的导光部件，由于金属元件和导光元件可形成为一体，所以当其应用于背光模组时，其具有较大的机械强度来支撑其上的各个元件，并且金属元件还可以避免导光元件发生漏光现象。因此，应用本发明实施例提供的导光部件，背光模组可以省去胶框和背板，这样，可以减轻或消除传统的包括胶框或背板的背光模组所存在的问题，同时还能保证背光模组整体的机械强度，降低背光模组的厚度，满足显示装置薄化的要求，并降低背光模组的生产和维护成本。
在一个实施例中，金属元件包括至少一个至少穿透金属元件的靠近导光元件的表面的孔，该孔内填充有形成所述导光元件的材料。因此，这样的孔可以是完全穿透金属元件的通孔，也可以是仅穿透金属元件的内表面的盲孔。由于被金属元件围住的导光元件的材料也填充到金属元件的孔中，所以，借助该孔可以增强金属元件和导光元件之间的结合的牢固性。
进一步地，这样的孔可以是锥形孔。锥形孔可以提供金属元件和导光元件之间的更强的结合力。
在另一实施例中，导光部件还可包括用于覆盖所述孔的不透光元件。设置不透光元件可以进一步减轻或消除可能由于孔导致的漏光。
进一步地，不透光元件包括油墨涂层或不透光胶带。
替代性地，在又一实施例中，金属元件与所述导光元件接触的面至少部分是粗糙表面。能够理解的是，粗糙的表面可以提供金属元件和导光元件之间的更强的结合力，从而提高金属元件和导光元件结合的牢固性。
替代性地，在又一实施例中，金属元件包括连接在一起的第一部分和第二部分，所述第一部分围绕所述导光元件的不用于接收光源的光的侧面，所述第二部分嵌入所述导光元件并与所述第一部分成一定的角度。因此，利用包括第一部分和第二部分的金属元件，金属元件不仅可通过第一部分与导光元件的侧面接触，还可通过其第二部分与导光元件的其它表面(例如，正表面或下表面)接触，从而促进导光元件和金属元件相结合的牢固性。
替代性地，在又一实施例中，金属元件的两个端部中的至少一个嵌入在所述导光元件中。
本发明的另一实施例还提供了一种无背板和胶框的背光模组，该背光模组包括光源，还包括如前述实施例中的任一实施例提供的导光部件。
在另一实施例中，背光模组还包括布置在导光部件上方的光学元件。
进一步地，导光元件包括垂直于其上表面的凸起结构，该凸起结构用于承载光学元件。
进一步地，凸起结构包括用于承载不同光学元件的第一阶梯和第 二阶梯。
本发明的再一实施例提供了一种显示装置，该显示装置可包括如前述实施例中的任一实施例提供的背光模组。这样的显示装置可以是任何需要背光模组作为背光源的显示设备，包括但不限于LCD显示器、电视机、手机、个人数字助理、平板电脑、笔记本电脑、台式计算机等等任何具备显示功能的电设备。
本发明的各实施例提供的导光部件可应用于背光模组，这样，背光模组可以省去胶框和背板，从而减轻或消除传统的包括胶框或背板的背光模组所存在的问题，同时还能保证背光模组整体的机械强度，降低背光模组的厚度，满足显示装置薄化的要求，并降低背光模组的生产和维护成本。
附图说明
下面，参考附图更详细地并且通过非限制性的示例方式描述本发明的实施例，以提供对本发明的原理和精神的透彻理解。需要说明的是，各个附图所示的特征和结构并不一定代表相应的部件和元件的实际形状和尺寸，而是仅仅是用以解释本发明的实施例的原理。
图1示意性地图示根据本发明的一个实施例的导光部件以及其外部光源的俯视图；
图2示意性地示出根据本发明的另一实施例的导光部件中金属元件的孔；
图3示意性地示出了根据本发明的另一实施例的导光部件中金属元件的与导光元件接触的粗糙表面；
图4示意性地示出了根据本发明的一个实施例的如图1所示的导光部件20沿着虚线A-A的局部截面图；
图5示意性地示出了根据本发明的另一实施例导光部件的局部俯视图，其中示出了导光部件中的金属元件的一个端部；
图6示意性地示出根据本发明的一个实施例的背光模组的结构图；
图7示意性地示出了根据本发明的又一实施例的背光模组的局部截面图；
图8示出了根据本发明的一个实施例的用于制作导光部件的方法的流程图。
具体实施方式
下面，通过示例的方式来详细说明本发明的具体实施例。应当理解的是，本发明的实施例不局限于以下所列举的示例，本领域技术人员利用本发明的原理或精神可以对所描述的各实施例进行修改和变型，得到形式不同的其它实施例，显然，这些实施例都落入本发明要求保护的范围。
此外，需要说明的是，本文所参考的附图是为了说明和解释本发明的实施例的需要，附图所体现的每个部件的形状、尺寸以及不同部件之间的连接仅仅用于示意性地说明本发明的实施例，并不构成对本发明的保护范围的限制。
根据本发明的实施例提供的导光部件，其包括形成为一体的金属元件和导光元件，导光元件用于接收从外部光源发射的光以生成背光。
图1示意性地示出了根据本发明的一个实施例的导光部件以及外部光源的俯视图。如图1所示，导光部件20包括形成为一体的金属元件201和导光元件202，导光元件202的至少一侧面的至少一部分用于接收光源10发射的光以生成背光，金属元件201围绕导光元件202的不用于接收光源10的光的侧面。当导光部件20应用于背光模组时，外部光源10可以是背光模组中的光源，此时，尽管图1中示出了光源10与导光部件20直接接触，但是，在实际的背光模组中，这不是必然的，光源10与导光部件20之间可以允许有适当的间隔或间隙。如图1所示，从光源10发射的光可以通过导光部件20的一个侧面进入导光元件202，导光元件202可以使得接收到的光从其上表面射出从而生成背光。因此，在图1的示例中，导光元件202的上表面即为背光的出光面。在一个实施例中，导光元件202的下表面(图1中未示出)可以是粗糙的，例如其下表面可具有用于反射光的网点或凹凸点。由此，从光源10发射的光通过导光元件202的全内反射以及其下表面上的网点或凹凸点的反射可以从导光元件202的上表面射出，从而生成背光。关于导光元件202使得其接收到的光从其上表面射出的技术对本领域技术人员而言是已知的，在此不再详述。此外，虽然在图1中仅仅示意性地示出了一个光源10，但是，可以理解的是，背光模组可以包括多个当前可得到的各种类型的光源中的任何适当的光源，包括但不限 于诸如冷阴极荧光管(CCFL)之类的线状光源、诸如发光二极管(LED)之类的点状光源，等等。
在该实施例中，由于导光部件20包括形成为一体的金属元件201和导光元件202，所以导光部件20可具有较大的机械强度，这使得直接在其上布置背光模组的其它元件成为可能。
在传统的背光模组中，通常还布置有胶框(例如，在导光部件的下面)，胶框可以起到防止导光部件漏光的作用，同时也为其上的各个元件提供支撑。为了适应显示装置薄化以及边框窄化的要求，胶框也被设计得越来越薄，其宽度也越来越窄，这导致胶框的支撑能力显著下降，也使得背光模组的整体强度下降。同时，这样的胶框也由于薄、窄的特点而变得柔软、易变形，从而增加了背光模组的组装难度。而且，在背光模组的使用和维护过程中，胶框很容易因变形而变得不可用，造成了胶框材料的浪费。另一传统的背光模组技术是设计带背板的背光模组，即在上述的带胶框的背光模组的基础上，提供一背板来支撑背光模组的各种其他元件。通常，背板作为底部支撑元件布置在胶框的下方，而且可以将胶框和背板设计为一体结构或者分离的两个结构。这样的背光模组虽然进一步增强了背光模组的机械强度，但是也使得整个背光模组的材料成本增加，且不利于背光模组厚度的减小。在同等厚度的背光模组的要求下，就需要导光部件变得更薄，这使得导光部件的设计和开发难度加大，提高了背光模组的成本。另外，如果将胶框与背板设计为一体结构，由于胶框和背板的收缩率不同，使得所得到的背光模组容易发生曲翘。
采用本实施例提供的导光部件20，可以减轻或消除这样的传统背光模组在生产和维护中存在的问题，并且可以在不影响背光模组整体的机械强度情况下，降低背光模组的厚度，满足显示装置薄化的要求。
具体而言，对于本实施例提供的导光部件20，由于金属元件201和导光元件202一体形成，所以其具有较大的机械强度来支撑其上的各个元件，也有利于增强背光模组的整体的机械强度，并且金属元件201还可以避免导光元件202发生漏光现象。因此，这样的导光部件为在背光模组中省去胶框和背板提供了可能，这样，可以减轻或消除传统的包括胶框的背光模组所存在的问题，同时还能保证背光模组整体的机械强度，降低背光模组的厚度，满足显示装置薄化的要求，并降 低生产和维护成本。此外，由于胶框可以被取消，且金属元件和导光元件一体成型，所以相比于传统的背光模组，本发明的实施例提供的背光模组中的各元件之间的累计公差得以减小，从而有效地缓解显示装置的柔性电路板(FPC)与背光模组的金手指(与光源电连接)之间的定位偏差问题，方便显示装置的制造和组装。
显示装置的背光模组可以根据其所应用的显示装置而具有不同的形状，因此，其中的导光部件20也可以取决于所应用的显示装置而具有不同的形状。例如，对于常见的手机等移动设备而言，导光部件20可具有大致为矩形的形状，而对于手表等可穿戴显示设备而言，导光部件可以具有诸如椭圆、圆形或方形之类的其他形状。因此，虽然图1示意性地示出了大致为矩形的导光部件20，但是本发明的实施例并不限制于此。
需要说明的是，虽然图1中所示的导光元件202的与光源10相对的一个侧面没有被金属元件201包围，但是，可以理解的是，在其它实施例中，金属元件201也可以包围导光元件202的与光源10相对的侧面的一部分，只要预留可以接收从光源10发射的光的适当开口即可。
此外，本专利申请的发明人还提出了各种解决方案，以使得金属元件201和导光元件202更牢固地结合在一起。
在一个实施例中，金属元件201可以包括至少一个至少穿透金属元件201的靠近导光元件202的表面的孔，所述孔内填充有形成所述导光元件的材料。换句话说，导光元件202不仅与金属元件201的靠近导光元件202的表面接触，而且，导光元件202的一部分还可以被容纳到金属元件201上的孔中，这样，金属元件201和导光元件202之间的结合力由于孔的存在而得到增强，使得二者更加牢固地结合在一起。在该实施例中，金属元件201的靠近导光元件202的表面也可称为金属元件201的内表面。图2示意性地示出了金属元件201上的一个孔201a，显然，在其它的实施例中，金属元件201可以包括任意数目的这样的孔201a。而且，在图2所示的实施例中，孔201a可以是一个锥形孔，这种形状的孔201a可以进一步增强金属元件201和导光元件202之间的结合力。另外，可以理解的是，孔201a可以是穿过金属元件201的通孔，也可以是仅穿透金属元件201的内表面而未穿透金属元件201的外表面的盲孔。
对于孔201a是通孔的情形，需要采取相关措施以避免由于通孔导致的漏光现象。因此，在一个实施例中，背光模组还可包括用于覆盖金属元件201上的孔201a的不透光元件。不透光元件包括但不限于油墨涂层、不透光的胶带等等。可以通过喷墨处理而形成油墨涂层，不透光的胶带可以粘贴到金属元件以覆盖孔201a，从而减轻或避免导光部件20上可能发生的漏光现象。
替代性地，根据本发明的另一实施例，导光部件20中的金属元件201与导光元件202接触的面至少部分是粗糙表面，如图3所示。由于这样的粗糙表面，可以增强金属元件201和导光元件202之间的结合力，从而使得它们更牢固地结合在一起。
根据本发明的又一实施例，可以将金属元件设计为具有特定的形状而促进其与导光元件202之间的结合。如图4所示，其示意性地示出了根据本发明的又一实施例的导光部件20的局部截面图，该截面图可以从如图1所示的导光部件20沿着虚线A-A得到的。在该实施例中，金属元件201包括连接在一起的第一部分和第二部分，第一部分围绕导光元件202的不用于接收光源的光的侧面，第二部分嵌入导光元件202并与第一部分成一定的角度。如图4所示，所述的第一部分可以是金属元件201的、与导光元件202的侧面紧密结合的平直部分，所述的第二部分可以是嵌入在导光元件202中、与该平直部分成一定角度的弯曲部分。可以理解的是，所述的金属元件201的第二部分可以与其第一部分形成任何适当的角度，只要其第二部分与导光元件202接触即可。例如，金属元件201的第二部分可以不像如图4所示的那样嵌入到导光元件202中，而是与金属元件201的第一部分相垂直而附接于导光元件202，金属元件201的第二部分也可以以与其第一部分成任何适当的角度而被嵌入在导光元件202中。
另外，虽然图4示出了金属元件201包括嵌入在导光元件202中的两个第二部分，但是，在其它可能的实施例中，金属元件201可以仅包括一个第二部分。
替代性地，在本发明的又一实施例中，金属元件的两个端部中的至少一个可以嵌入到导光元件中，以促进金属元件与导光元件之间的结合。如图5所示，其中示意性地示出了根据本发明的又一实施例的导光部件20的局部俯视图，其中示出了导光部件20中的金属元件201 的一个端部。如图5所示，金属元件201的一个端部被嵌入到导光元件202中，如此，可以使得金属元件201更加牢固地附接于导光元件202。可以理解的是，虽然未被图示，金属元件201的另一端部也可以用类似的方式而嵌入到导光元件202中。
可以理解的是，虽然以上描述了若干个导光部件20的实施例，但是，在本发明的其他实施例中，可以采用上述关于导光部件20的多个实施例的任何组合来进一步促进导光元件202和金属元件201的紧密结合。也就是说，其它可能的实施例的导光部件20可以具有如上述实施例表现出的各个特征中的任何特征的组合。例如，在又一实施例中，导光部件20中的金属元件201可以同时具备如图2所示的孔、如图3所示的粗糙表面、如图4所示的第一部分已经第二部分、以及如图5所示的端部。
如前所述，本发明实施例提供的导光部件可以应用于显示装置的背光模组，图6示意性地示出了具有如上述实施例所描述的导光部件的背光模组的结构图。在该示例中，背光模组并不包含胶框或背板。如图6所示，除了以上所描述的导光部件20和光源10之外，在该实施例中，背光模组还包括布置在导光部件20下方的反射元件30。尽管导光部件20本身可以使得进入其中的光从其出光面(上表面)射出，但是仍不能排除有些光会从导光部件20的其它表面射出，反射元件30可以将这些光重新反射到导光部件20，从而提高背光模组的光源利用效率。在一个实施例中，反射元件30可以用具有高反射率的材料形成。例如，反射元件30可包括聚对苯二甲酸乙二醇酯(PET)层以及形成在其下方的聚酯薄膜。进入到PET层中的光可以通过其中的气泡的全反射作用而被反射，另一些光可以由聚酯薄膜反射回到导光部件20。
如前所述，利用上述实施例提供的导光部件，可以直接在其上布置背光模组中的其它元件。因此，根据本发明另一实施例提供的背光模组，还可以包括布置在导光部件上方的光学元件。这些光学元件可以根据要发射的背光的期望特性而选择性地设置，例如，可以选择布置用以改进所发射的背光的均匀性、亮度等光学特性的光学元件。
如图6所示，在另一实施例中，所选择的光学元件包括从下至上依次布置在导光部件20上方的扩散膜40、增量膜50、60以及遮光胶带70。扩散膜40位于导光部件20的上方并且与其相邻，从导光部件 20射出的背光经过扩散膜40可以产生漫反射，从而使得光线分布更加均匀，有利于背光模组的面内亮度的均一化。在一个实施例中，扩散膜40可以包括基层以及分别位于基层上方和下方的扩散层和保护层。基层可以用诸如聚对苯二甲酸乙二醇酯(PET)、聚碳酸酯等之类的光透过率高的材料形成，扩散层和保护层可以包括聚甲基丙烯酸甲酯材料。例如，扩散层可以包括粒径不规则的聚甲基丙烯酸甲酯颗粒作为扩散粒子。光线在经过扩散层时可以不断地在两个折射率相异的介质中穿过，引起光线发生许多折射、反射与散射的现象，形成光学扩散的效果。增量膜50、60可以提升背光模组发射的背光的亮度，从而有利于提升背光模组所应用的显示装置的图像质量。
在图6所示的实施例中，增亮膜可包括上下布置的第一棱镜60和第二棱镜50。因此，增量膜可以作为一种聚光装置，利用光在棱镜内的全反射和折射，将从扩散膜40射出的光集中在一定的角度范围内射出，从而提高射出的光的亮度。从扩散膜40射出的光的一部分可以直接通过第二棱镜50、第一棱镜60射出，另一部分光可能通过折射、全反射而在扩散膜40、第二棱镜50、第一棱镜60之间循环，直到其符合从第一棱镜60射出的条件之后才会停止这种循环。图6中所示的第一棱镜60可以捕获从第二棱镜50逃逸的光，从而提高背光模组的光源利用效率。尽管如此，可以理解的是，在其它可能的实施例中，也可以仅仅设置一个棱镜。
根据本发明的另一实施例，导光元件可以不是一个规则的结构，例如，其可包括垂直于其上表面的凸起结构，该凸起结构可用于承载以上描述的背光模组的光学元件。
图7示出了根据本发明的另一实施例的背光模组的局部截面图，该截面图所示的截面可以垂直于背光模组的上表面。如图7所示，导光元件202的凸起结构包括用于承载扩散膜40、第二棱镜50、第一棱镜60的第一阶梯以及用于承载遮光胶带70的第二阶梯。利用这样的凸起结构，可以以一种简单、低成本的方式将各种光学元件布置在导光部件上方，有助于简化背光模组的结构，降低背光模组的制作、组装成本。
根据本发明的实施例，导光部件20中的金属元件201可以采用任何合适的金属材料形成，包括但不限于铁、不锈钢等，导光元件202 可以采用任何合适的透光材料形成，包括但不限于聚甲基丙烯酸甲酯、环烯烃聚合物、聚碳酸酯等。
以上描述了本发明的背光模组的各种实施例，在这些实施例中，可以省去传统的背光模组中采用的胶框以及背板，可以在不影响背光模组的机械强度的情况下减轻或消除传统的背光模组存在的一些问题，而且，使得背光模组的厚度得以降低，满足显示装置薄化以及边框窄化的要求，同时降低背光模组的生产和维护成本。
本发明的另一实施例提供了一种显示装置，其可包括前述实施例中的任一实施例提供的显示模组。这样的显示装置可以是任何需要背光模组作为背光源的显示设备，显示装置的示例包括但不限于LCD显示器、电视机、手机、个人数字助理、平板电脑、笔记本电脑、台式计算机等等任何具备显示功能的电设备。由于这些显示装置包括前述实施例中任意实施例描述的显示模组，因此，其相应地也具有显示模组所具备的特征和优点，在此不再重复。
本发明的另一实施例还提供了一种制作背光模组中的导光部件的方法，该导光部件包括形成为一体的金属元件和导光元件，所述方法可包括如下步骤：根据应用背光模组的显示装置的形状确定导光部件的形状；制作形状与导光部件的形状一致的金属元件；将金属元件置于相应的注塑模具内，并使用透光材料填充由金属元件围成的空间以形成导光元件。
当前，已经出现具有不同形状的各种各样的显示设备，以满足不同人群对显示设备的审美需求和个性化要求。相应地，显示设备的背光模组以及背光模组中的导光部件也需具备类似的形状。因此，在本发明的制作背光模组中的导光部件的方法的实施例中，首先根据应用背光模组的显示装置的形状确定导光部件的形状。例如，对于诸如常规的手机等之类的移动设备，可以将导光部件的形状确定为大致矩形，而对于诸如常规的手表等之类的穿戴式设备，可以将导光部件的形状确定为大致圆形、方形或椭圆形等等。因此，本文对导光部件的形状不作限定，其根据实际所应用的显示设备的外形而确定。然后，可以制作形状与导光部件的形状一致的金属元件，这样，确定了金属元件的形状，也就可以大致确定了导光部件的形状。此后，在本实施例中，可以借助注塑模具来完成金属元件和导光元件的一体化。在该实施中， 可以将成型的金属元件置于相应的注塑模具内，并使用透光材料填充由金属元件围成的空间以形成导光元件。例如，在金属元件被放置到注塑模具之后，可以将受热熔化的透光材料通过高压射入注塑模具的模腔，经冷却固化之后，形成导光元件和金属元件的一体化结构。如此，可以以一种较简单、低成本的方式实现背光模组的导光部件的制作。在制作过程中，所采用的透光材料可包括但不限于聚甲基丙烯酸甲酯、环烯烃聚合物、聚碳酸酯中的任何一种。
进一步地，在根据本发明实施例提供的制作背光模组的导光部件的方法中，制作金属元件的步骤可进一步包括：制作金属元件使得其长度小于导光部件的周长。预先确定金属元件的长度并使得其小于导光部件的周长，可以使得最终的金属元件不会全部包围导光元件，从而可以为形成导光部件的用于接收从光源发射的光的侧面部分做好准备。进一步地，制作金属元件的步骤可进一步包括：制作金属元件使得其形成一个具有开口的非封闭弯曲结构，使得所形成的导光部件能够经由开口接收从背光模组的光源发射的光。可以理解的是，这样的非封闭的弯曲结构的形状可以对应于所确定的导光部件的形状。
在另一实施例中，制作金属元件的步骤可进一步包括：在金属元件上形成至少一个用于填充透光材料的孔。如之前所讨论的，这样的孔可以容纳形成导光元件的材料，这可以增强导光元件和金属元件之间的结合力，有益于所形成的导光部件的机械强度。如之前已经讨论过的，这样的孔可以是通孔、盲孔，并且可以具有不同的形状，例如，锥形孔。
对于在金属元件上形成通孔的实施例，可以进一步采用不透光元件来覆盖所形成的孔。例如，可以采用喷墨处理形成不透光元件，也可以用不透光胶带作为不透光元件，从而避免导光部件的漏光现象。
在另一实施例中，制作金属元件的步骤可进一步包括：在金属元件上形成用于与导光元件接触的粗糙表面。该粗糙的表面同样可以促进金属元件和导光元件之间的更牢固的结合，有益于导光部件的机械强度。
在又一实施例中，制作金属元件的步骤还可包括：形成金属元件的第一部分和第二部分，第一部分和第二部分连接在一起，并且第一部分围绕导光元件的不用于接收光源的光的侧面，第二部分嵌入所述 导光元件并与所述第一部分成一定的角度。
在又一实施例中，制作金属元件的步骤还可包括：形成金属元件的两个端部，使得两个端部中的至少一个能够嵌入到所形成的导光元件中。
这些措施对于促进金属元件和导光元件之间更紧密结合是有益的，并且，在制作金属元件时，可以采用以上所描述的制作金属元件的步骤中的任何步骤的组合，以进一步促进金属元件和导光元件的紧密结合。
在另一实施例中，在制作背光模组中的导光元件时，还可以采用透光材料形成垂直于导光元件的上表面的凸起结构，以用于承载背光模组中的光学元件。
以上已经参照附图详细描述了本发明的实施例，但是，应该注意的是，上述实施例用来举例说明而不是限制本发明，并且本领域技术人员将能够设计许多替代性实施例而并未脱离所附权利要求的范围。在权利要求中，词语“包括”并未排除除了权利要求中所列举的那些之外的元件或步骤的存在。元件之前的词语“一”或“一个”并未排除多个这样的元件的存在。某些特征被记载在相互不同从属权利要求中这一纯粹事实并不意味着这些特征的组合不能被有利地使用。

Claims (13)

  1. 一种用于背光模组的导光部件，包括一体的金属元件和导光元件，所述导光元件的至少一侧面的至少一部分用于接收光源发射的光以生成背光，所述金属元件围绕所述导光元件的不用于接收光源的光的侧面。
  2. 如权利要求1所述的导光部件，其中，所述金属元件包括至少一个至少穿透金属元件的靠近导光元件的表面的孔，所述孔内填充有形成所述导光元件的材料。
  3. 如权利要求2所述的导光部件，其中，所述孔是锥形孔。
  4. 如权利要求2所述的导光部件，其中，所述导光部件还包括用于覆盖所述孔的不透光元件。
  5. 如权利要求4所述的导光部件，其中，所述不透光元件包括油墨涂层或不透光胶带。
  6. 如权利要求1所述的导光部件，其中，所述金属元件与所述导光元件接触的面至少部分是粗糙表面。
  7. 如权利要求1所述的导光部件，其中所述金属元件包括连接在一起的第一部分和第二部分，所述第一部分围绕所述导光元件的不用于接收光源的光的侧面，所述第二部分嵌入所述导光元件并与所述第一部分成一定的角度。
  8. 如权利要求1所述的导光部件，其中所述金属元件的两个端部中的至少一个嵌入在所述导光元件中。
  9. 一种无背板和胶框的背光模组，包括光源，其中所述背光模组包括如权利要求1-8中的任一项所述的导光部件。
  10. 如权利要求9所述的背光模组，其中所述背光模组还包括布置在所述导光部件上方的光学元件。
  11. 如权利要求10所述的背光模组，其中所述导光元件包括垂直于其上表面的凸起结构，所述凸起结构用于承载所述光学元件。
  12. 如权利要求11所述的背光模组，其中所述凸起结构包括用于承载不同光学元件的第一阶梯和第二阶梯。
  13. 一种显示装置，其包括如权利要求9-12中任一项所述的背光模组。
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US20180231842A1 (en) 2018-08-16
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