WO2019042090A1 - 背光模组及显示装置 - Google Patents

背光模组及显示装置 Download PDF

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Publication number
WO2019042090A1
WO2019042090A1 PCT/CN2018/098924 CN2018098924W WO2019042090A1 WO 2019042090 A1 WO2019042090 A1 WO 2019042090A1 CN 2018098924 W CN2018098924 W CN 2018098924W WO 2019042090 A1 WO2019042090 A1 WO 2019042090A1
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WO
WIPO (PCT)
Prior art keywords
positioning
convex
positioning portion
gap
light guiding
Prior art date
Application number
PCT/CN2018/098924
Other languages
English (en)
French (fr)
Inventor
乔勇
先建波
吴新银
马永达
Original Assignee
京东方科技集团股份有限公司
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 filed Critical 京东方科技集团股份有限公司
Priority to US16/496,586 priority Critical patent/US10962706B2/en
Publication of WO2019042090A1 publication Critical patent/WO2019042090A1/zh

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0081—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
    • 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
    • G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
    • 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
    • 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

Definitions

  • the present disclosure relates to the field of display technologies, and in particular, to a backlight module and a display device.
  • the liquid crystal display device is a passive light-emitting flat panel display device, which has low power consumption, small radiation, and good display effect, and has become a mainstream product on the market.
  • a first aspect of the present disclosure provides a backlight module.
  • the backlight module includes a back plate and a light guide plate, and the light guide plate and the back plate are stacked together;
  • the back plate includes a bottom surface and a plurality of side walls on a side of the bottom surface, the plurality of a positioning gap is formed between two adjacent sidewalls of the sidewall;
  • the light guide plate includes a light guide plate main body portion and at least one light guiding positioning portion disposed on a side surface of the light guide plate main body portion, the light guiding position The portion is engaged with the positioning gap.
  • the backlight module further includes an optical film, the optical film is located on a light emitting surface of the light guide plate; the optical film includes an optical film main body portion and at least one of the optical a diaphragm positioning portion of the diaphragm main body portion; the diaphragm positioning portion is engaged with the positioning gap.
  • an orthographic projection of the diaphragm positioning portion on a plane of the bottom surface overlaps with an orthographic projection of the positioning gap in which the diaphragm positioning portion is engaged in a plane of the bottom surface
  • the orthographic projection of the light guiding positioning portion on the plane of the bottom surface overlaps with the orthographic projection of the positioning gap engaged by the light guiding positioning portion on the plane of the bottom surface.
  • the thickness of the positioning void is the same as the thickness of the adjacent two sidewalls forming the positioning void, and the thickness direction of the positioning void is adjacent to the adjacent two forming the positioning void
  • the wall thickness direction of the side wall is the same; the outer edge line of the orthographic projection of the light guiding positioning portion on the plane of the bottom surface is located at the plane of the bottom surface where the positioning gap of the light guiding positioning portion is engaged The outer edge line of the orthographic projection of the diaphragm positioning portion on the plane of the bottom surface is located in the orthographic projection of the positioning gap that is adjacent to the diaphragm positioning portion on the plane of the bottom surface.
  • the at least one light guiding positioning portion is correspondingly engaged with the at least one positioning gap, and the at least one diaphragm positioning portion is engaged with the at least one positioning gap in a one-to-one correspondence.
  • a plane of each of the plurality of sidewalls is perpendicular to a plane of the bottom surface, and the light guiding positioning portion and the light guide body portion are in the same plane, the optical film body The portion and the diaphragm positioning portion are located on the same plane.
  • each of the positioning voids includes a first direction positioning void and a second direction positioning void that communicate with each other, the first direction positioning void and the second direction positioning void communicating; each of the positioning voids comprises The orthographic projection of the first direction positioning void in the plane of the bottom surface and the orthographic projection of the second direction positioning void in the plane of the bottom surface have a positioning angle, the positioning angle is equal to 75°-135°; at least one film One of the film positioning portions shares a positioning gap with one of the at least one light guiding positioning portion, and one of the at least one light guiding positioning portion and the at least one light guiding portion.
  • the positioning gap in which the light guiding positioning portion of the positioning portion is engaged includes a first direction positioning gap, and one of the at least one diaphragm positioning portion and the at least one diaphragm positioning portion
  • the positioning gap in which the diaphragm positioning portion is engaged includes a second direction positioning gap engagement.
  • the at least one light guiding positioning portion and the at least one diaphragm positioning portion share at least one positioning gap in a one-to-one correspondence.
  • each of the at least one light guiding positioning portion is a convex light guiding positioning portion
  • each of the at least one diaphragm positioning portion is a convex film a sheet positioning portion; a convex direction of the convex light guiding positioning portion sharing the positioning gap is different from a convex direction of the convex diaphragm positioning portion.
  • each of the at least one light guiding positioning portion is a convex light guiding positioning portion, and the convex light guiding positioning portion of the at least one light guiding positioning portion is convex.
  • the starting direction is parallel to the plate surface of the light guide plate main body portion;
  • each of the at least one diaphragm positioning portion is a convex diaphragm positioning portion, and each of the at least one diaphragm positioning portion is convex a protruding direction of the protruding diaphragm positioning portion is parallel to a plate surface of the light guide plate main body portion; and a convex portion of the convex light guiding positioning portion that shares the positioning gap with the convex diaphragm positioning portion a direction perpendicular to the incident surface of the light guide plate, and a convex direction of the convex diaphragm positioning portion sharing the positioning gap with the convex light guiding positioning portion is parallel to an incident surface of the light guide plate;
  • the number of the convex light guiding positioning portions is plural, the number of the convex diaphragm positioning portions is plural, and at least two of the plurality of convex light guiding positioning portions are convex.
  • the protruding direction of the starting light guiding positioning portion is different, and at least two of the plurality of convex diaphragm positioning portions have different convex directions.
  • the convex direction of each of the plurality of convex light guiding positioning portions is clockwise and counterclockwise Varying or alternating; along the circumferential direction of the side surface of the main body of the optical film, the convex direction of each of the plurality of convex diaphragm positioning portions is clockwise and counterclockwise Change or alternate.
  • the backlight module further includes a plastic frame, wherein a side of the light guide plate main body and a sidewall of each of the plurality of sidewalls have a first buffer space, a second buffer space is formed between a side surface of the optical film main body portion and each of the plurality of side walls, the first buffer space, the second buffer space, and the plurality of side walls Each of the plurality of side walls corresponds to a first buffer space and a second buffer space, and a buffer receiving area is formed, and an inner buffer sheet is disposed in the buffer receiving area;
  • the plastic frame includes a plastic frame body and at least one outer buffer sheet, wherein the at least one outer buffer sheet has a one-to-one correspondence with the at least one inner buffer sheet; the at least one outer buffer sheet and the at least one inner buffer sheet are disposed at the The same surface of the main body of the plastic frame; the outer frame of the plastic frame body, each of the at least one outer buffer sheet and the corresponding inner buffer sheet of the at least one inner buffer sheet form a side
  • the number of layers of the optical film is a plurality of layers, and each of the plurality of optical films is provided with a counter mark hole, and each layer of the optical film in the multilayer optical film is The orthogonal projections of the alignment mark holes provided on the plane of the bottom surface are independent of each other.
  • the light guide plate is a side-lit light guide plate
  • the backlight module includes a light-shielding region and a light-transmitting region
  • the light-guiding positioning portion is distributed with a guide located in the light-transmitting region and the light-shielding region.
  • the light guide plate dot is located in the light transmitting area and the light blocking area.
  • a second aspect of the present disclosure also provides a display device including the backlight module.
  • the display device further includes a display panel
  • the plastic frame in the backlight module further includes a protective sleeve; the protective sleeve is disposed on the plastic frame body without forming the inner buffer sheet The surface of the display panel is located within the protective cover.
  • FIG. 1 is a schematic structural view of a backboard in some embodiments of the present disclosure.
  • FIG. 2 is a schematic diagram of the cooperation between the backboard and the light guide plate in some embodiments of the present disclosure.
  • Fig. 3 is an enlarged view showing the structure of the upper left corner of Fig. 2;
  • FIG. 4 is an enlarged view of the structure of the upper right corner of FIG. 2.
  • Figure 5 is an enlarged view of the structure of the lower right corner of Figure 2.
  • Figure 6 is an enlarged view of the structure of the lower left corner of Figure 2.
  • FIG. 7 is a schematic diagram of the cooperation of the back plate, the light guide plate and the optical film in some embodiments of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a light guide plate according to some embodiments of the present disclosure.
  • FIG. 9 is a schematic diagram of distribution of light guide plate dots on a light guide plate according to some embodiments of the present disclosure.
  • Figure 10 is a schematic view showing the structure of an optical film in some embodiments of the present disclosure.
  • FIG. 11 is a schematic view showing the position of a positioning mark hole provided by an optical film in some embodiments of the present disclosure
  • FIG. 12 is a schematic diagram of cooperation between a plastic frame and a back plate according to some embodiments of the present disclosure.
  • FIG. 13 is a schematic structural view of a plastic frame in some embodiments of the present disclosure.
  • FIG. 14 is a side view of a backlight module according to some embodiments of the present disclosure.
  • Figure 15 is a schematic view showing the structure of a buffer accommodating area in some embodiments of the present disclosure.
  • FIG. 16 is a schematic structural diagram of a display device according to some embodiments of the present disclosure.
  • the liquid crystal display device includes a backlight module and a display panel disposed on the light emitting surface of the backlight module.
  • the backlight module serves as a light source to provide light to the display panel.
  • the display panel images the light to achieve the purpose of image display.
  • the backlight module generally includes a back plate and a light guide plate disposed on the back plate.
  • the bottom surface of the back plate is provided with a positioning structure similar to the positioning post, so that the light guide plate is positioned on the back plate, thereby ensuring the image displayed by the display panel is stable.
  • the bottom surface is provided with a positioning structure for ensuring that the image displayed by the display panel is stable
  • the projection of the positioning structure disposed on the bottom surface of the back panel must be located at the frame portion of the display panel to ensure that the positioning structure does not affect the display panel.
  • the image is displayed so that the width of the frame portion of the display panel is limited by the size of the positioning structure provided on the bottom surface of the back panel, which is disadvantageous for the narrow frame of the liquid crystal display device.
  • the backlight module 1 provided by the embodiment of the present disclosure includes a back plate 10 and a light guide plate 11 .
  • the light guide plate 10 and the back plate 10 are stacked together.
  • the backing plate 10 includes a bottom surface 10a, and a plurality of side walls 100 on the sides of the bottom surface 10a.
  • the plurality of side walls 100 may be located on the same side of the bottom surface 10a or on different sides of the bottom surface 10a.
  • a positioning gap 101 is formed between two adjacent side walls 100 of the plurality of side walls 100.
  • the light guide plate 11 includes a light guide plate main body portion 111 and at least one light guiding positioning portion 110 provided on a side surface of the light guide plate main body portion 111.
  • the light guiding positioning portion 110 is engaged with the positioning gap 101 in one-to-one correspondence.
  • a positioning gap 101 is formed between each of the two side walls 100 of the plurality of side walls 100.
  • the number of the side walls 100 can be set according to the number of the light guiding positioning portions 110.
  • the light guiding position portion 110 can be made of the same material as the light guide plate main body portion 111, so that when the light guide plate 11 is a side-in type light guide plate, the light can be in the light guide plate main body portion 111 and the guide of the same material.
  • the light board positioning portion 110 is transmitted to avoid the problem that the light guiding uniformity is poor due to the difference in materials of the light guide plate main body portion 111 and the light guide plate positioning portion 110.
  • a reflective sheet (not shown in FIG.
  • FIG. 16 is generally disposed between the back plate 10 and the light guide plate 11 to reflect the light of the light guide plate 11 in the direction of the back plate 10, so that the light reflected by the reflective sheet is reflected. It is again guided by the light guide plate 11 to achieve the full use of light.
  • a positioning gap 101 is formed between two adjacent sidewalls of the plurality of sidewalls 100 , and the light guide panel body portion included in the light guide plate 11 is included.
  • At least one light guiding positioning portion 110 is disposed on a side surface of the 111.
  • the positioning gap 101 is located between the adjacent two side walls of the plurality of side walls 100 provided on the side of the bottom surface 10a, which allows the light guide plate 11 to be positioned on the back plate 10, the side edges of the bottom surface 10a can be fully utilized.
  • the existing space between the adjacent two side walls of the plurality of side walls 100 is provided as the positioning gap 101, and the positioning plate is additionally provided on the bottom surface 10a to position the light guide plate on the back plate. Therefore, the backlight mode is When the group 1 is applied to the display device 3, the positioning gap 101 as the positioning structure does not limit the width of the frame portion of the display panel 2, which is advantageous for the narrow frame of the display device 3.
  • the positioning voids 101 are structurally formed by adjacent two of the plurality of sidewalls 100.
  • a plurality of gaps are formed in the side wall of the existing back sheet 10 as the positioning gaps 101, and the gaps are spaced apart to ensure that one side of each of the apertures has a side wall from the structure. 100.
  • a positioning gap 101 is formed between adjacent ones of the plurality of side walls 100.
  • the thickness of the positioning gap 101 in the present disclosure is substantially the same as the arm thickness of the adjacent two side walls 100 forming the positioning gap 101, and the thickness direction of the positioning gap 101 and the adjacent two adjacent holes 101 are formed.
  • the wall thickness direction of the side wall 100 is the same.
  • the side wall of the backboard is a closed swing structure disposed around the side of the bottom surface included in the backboard.
  • the cross-sectional shape of the closed pivot structure along a plane perpendicular to the axis of revolution is determined by the shape of the bottom surface. For example, if the shape of the bottom surface is a rectangle, the shape of the closed structure along the plane perpendicular to the rotation axis is a rectangle. If the shape of the bottom surface is a circular structure, the closed-type swivel structure is circular in cross-sectional shape along a plane perpendicular to the rotation axis.
  • the orthographic projection of the light guiding positioning portion 110 on the plane of the bottom surface 10a and the positioning gap 101 of the light guiding positioning portion are orthogonal to the plane of the bottom surface 10a. Overlapping ensures that the light guiding positioning portion 110 is engaged with the corresponding positioning gap 101.
  • the orthographic projection of the light guiding positioning portion 110 on the plane of the bottom surface 10a overlaps with the orthographic projection of the positioning gap 101 where the light guiding positioning portion is engaged on the plane of the bottom surface 10a, there are two implementations as follows.
  • the outer edge line of the orthographic projection of the light guiding positioning portion 110 on the plane of the bottom surface 10a is located at the bottom surface of the positioning gap 101 where the light guiding positioning portion 110 is engaged.
  • 10a is in the orthographic projection of the plane.
  • the outermost end of the light guiding positioning portion 110 is located in a region within the plane of the outer side faces of the two side walls 100 adjacent to the positioning gap 101 to which the light guiding positioning portion 110 is engaged to reduce the guide.
  • the light positioning portion 110 occupies space of the frame region of the backlight module, so that the frame region of the backlight module is relatively narrow.
  • the outer edge line of the orthographic projection of the light guiding positioning portion 110 on the plane of the bottom surface 10 a exceeds the card position of the light guiding positioning unit 110 .
  • the positioning void 101 is at the outer edge of the orthographic projection of the plane of the bottom surface 10a.
  • the outermost end of the light guiding positioning portion 110 is located outside the plane of the outer side surfaces of the two side walls 100 adjacent to the positioning gap 101 where the light guiding positioning portion 110 is engaged, so that the light guiding position is The outermost end of the portion 110 is beyond the plane of the outer side surfaces of the two side walls 100 adjacent to the positioning gap 101 to which the light guiding positioning portion 110 is engaged.
  • the light guiding positioning portion 110 increases the backlight module.
  • the width of the border area is the width of the border area.
  • the outermost end of the light guiding positioning portion 110 is adjacent to the positioning gap 101 engaged with the light guiding positioning portion 110 .
  • the light guide plate 11 is a side-entry light guide plate, after the light enters the inside of the light guide plate 11, total reflection occurs at the outermost end of the light guide positioning portion 110.
  • the display image displayed by the display device 3 seen by the user is illuminated corresponding to the position of the light guiding position portion 110.
  • a light guide plate dot 11a is disposed on each of the light guide plate main body portion 111 and the at least one light guiding positioning portion 110.
  • the light guide plate dots 11 a are distributed not only in the light-transmitting area AA of the backlight module 1 corresponding to the light guide plate 11 but also in the light-shielding area BM of the light-shielding plate 11 corresponding to the backlight module 1 .
  • the light guide plate dot 11a is distributed not only in the light-transmitting area AA of the light-shielding plate 11 corresponding to the backlight module 1, but also in the light-shielding area of the light-shielding plate 11 corresponding to the backlight module 1. Therefore, when light enters the light guide plate 11, scattering occurs at the halftone point of the light guiding positioning portion 110, so that a part of the scattered light is reflected to the light shielding area BM, thereby reducing the image corresponding to the display device 3 displayed by the user.
  • the brightness of the position of the light guiding position portion 110 is distributed not only in the light-transmitting area AA of the light-shielding plate 11 corresponding to the backlight module 1, but also in the light-shielding area of the light-shielding plate 11 corresponding to the backlight module 1. Therefore, when light enters the light guide plate 11, scattering occurs at the halftone point of the light guiding positioning portion 110, so that a part of the scattered light is reflected to the
  • the backlight module further includes an optical film 12.
  • the optical film 12 is disposed on the surface of the light guide plate 11 away from the back plate, the optical film 12 is generally located on the light emitting surface of the light guide plate 11.
  • the optical film 12 in order to ensure that the optical film 12 is well positioned on the light-emitting surface of the light guide plate 11, the optical film 12 includes the optical film main body portion 121 and at least A diaphragm positioning portion 120 provided in the optical film main body portion 121.
  • the at least one diaphragm positioning portion 120 is engaged with the positioning gap 101 in a one-to-one correspondence.
  • the at least one diaphragm positioning portion 120 can be made of the same material as the at least one optical film 12.
  • the plurality of side walls 100 when the plurality of side walls 100 include two side walls 100, there is a positioning gap 101 between the two side walls 100.
  • the number of the diaphragm positioning portions 120 included in the optical film 12 is one.
  • each of the optical films 12 of the multilayer optical film 12 is provided with a registration mark hole 12a.
  • the image displayed by the display device 3 corresponds to the problem that the position of the alignment mark hole 12a is dark (this The problem is called the problem of uneven optical switching.)
  • the alignment marks 12a of the optical film 12 of each of the multilayer optical films 12 are independent of each other in the plane of the bottom surface 10a, thereby reducing the display device.
  • the displayed image corresponds to the darkness of the position of the registration mark hole 12a, thereby alleviating the problem that the display device 3 does not have an image quality displayed by the display device 3 due to uneven optical switching.
  • the optical film 12 described above includes a prism sheet and a diffusion sheet which are laminated.
  • a prism sheet alignment mark hole 12a is formed on both the prism sheet and the diffusion sheet.
  • the alignment mark hole 12a formed on the prism sheet and the alignment mark hole 12a formed on the diffusion sheet are independent of the orthographic projection of the plane of the bottom surface 10a, the alignment mark hole 12a opened on the prism sheet and the The orthographic projections of the alignment mark holes 12a formed on the diffusion sheet on the plane of the bottom surface 10a do not overlap or overlap, so that the image displayed by the display device 3 caused by the unevenness of the prism sheet and the optical surface of the diffusion sheet can be alleviated.
  • the problem of poor quality As for the positional relationship between the prism sheet and the diffusion sheet, it is set according to actual needs, and is not limited herein.
  • the orthographic projection of the diaphragm positioning portion 120 on the plane of the bottom surface 10a and the positioning gap 101 engaged with the diaphragm positioning portion 120 are on the bottom surface 10a.
  • the orthographic projections of the planes overlap to ensure that the diaphragm positioning portion 120 can be engaged in the corresponding positioning gap 101. Since each of the positioning voids 101 is formed by two adjacent sidewalls of the plurality of sidewalls 100, a positioning gap 101 and an optical film 12 formed by two adjacent sidewalls of the plurality of sidewalls 100 can be utilized.
  • a diaphragm positioning portion 120 is included to engage the positioning film 101 formed by the adjacent two side walls of the plurality of side walls 100 to position the optical film 12.
  • the orthographic projection of the diaphragm positioning portion 120 on the plane of the bottom surface 10 a and the positioning gap 101 of the diaphragm positioning portion 120 are located on the bottom surface 10 a.
  • the orthographic projections of the plane overlap.
  • the outer edge line of the orthographic projection of the diaphragm positioning portion 120 on the plane of the bottom surface 10 a is located in engagement with the diaphragm positioning portion 120 .
  • the positioning void 101 is within the orthographic projection of the plane in which the bottom surface 10a lies.
  • the diaphragm positioning portion 120 when the outer edge line of the orthographic projection of the diaphragm positioning portion 120 on the plane of the bottom surface 10a is located in the orthographic projection of the positioning space 101 where the diaphragm positioning portion 120 is engaged in the plane of the bottom surface 10a, the diaphragm The outermost end of the positioning portion 120 is located in a region within the plane of the outer side faces of the two side walls 100 adjacent to the positioning gap 101 to which the diaphragm positioning portion 120 is engaged, so that the diaphragm positioning portion 120 can reduce the backlight mode
  • the space of the border area of the group occupies. Therefore, the film positioning portion 120 can reduce the space occupied by the frame region of the backlight module.
  • the outer edge line of the orthographic projection of the film positioning portion 120 on the plane of the bottom surface 10a is located at the film positioning portion 120.
  • the positioning gap 101 is within the orthographic projection of the plane of the bottom surface 10a, which is advantageous for narrowing the frame area of the backlight module;
  • the outer edge line of the orthographic projection of the diaphragm positioning portion 120 on the plane of the bottom surface 10 a exceeds the positioning of the diaphragm positioning portion 120 .
  • the outer edge of the space 101 is orthographically projected on the plane of the bottom surface 10a.
  • the outer edge line of the orthographic projection of the diaphragm positioning portion 120 on the plane of the bottom surface 10a exceeds the outer edge of the orthographic projection of the positioning space 101 where the diaphragm positioning portion 120 is engaged on the plane of the bottom surface 10a
  • the outermost end of the diaphragm positioning portion 120 extends beyond the plane of the outer side surfaces of the two side walls 100 adjacent to the positioning gap 101 where the diaphragm positioning portion 120 is engaged, so that the diaphragm positioning portion 120 increases the backlight mode.
  • the border area of the group causes the width of the border area of the backlight module to increase slightly.
  • the diaphragm positioning portion 120 when the at least one diaphragm positioning portion 120 is in one-to-one correspondence with the at least one positioning gap 101 , the diaphragm positioning portion 120 is formed.
  • the height of the adjacent two side walls of the plurality of side walls 100 of the combined positioning gap 101 is at least greater than the thickness of the light guide plate 11 such that the positioning gaps 101 formed by the adjacent two side walls of the plurality of side walls 100 are After being engaged with the corresponding light guiding positioning portion 110, there are remaining positions in the height direction of the adjacent two side walls of the plurality of side walls 100 for engaging the corresponding diaphragm positioning portion 120.
  • the height directions of the adjacent two sidewalls of the plurality of sidewalls 100 of this embodiment are the same as the thickness direction of the light guide plate 11 and the thickness direction of the optical film 12, respectively.
  • the heights of two adjacent sidewalls of the plurality of sidewalls 100 forming the positioning void 101 are at least equal to the above-mentioned guide.
  • the height of two adjacent sidewalls of the plurality of sidewalls 100 forming the positioning gap 101 is equal to the height of the light guide plate 11
  • the sum of the thickness and the thickness of the optical film 12 is 7 to reduce the influence on the thickness of the backlight module 1 while ensuring the positioning accuracy of the light guide plate 11 and the optical film 12, so that the backlight module 1 is light and thin.
  • the plane of each of the plurality of side walls 100 is perpendicular to the plane of the bottom surface 10a.
  • FIG. 1 , FIG. 2 and FIG. 8 after the light guiding positioning unit 110 and the light guiding plate main body portion 111 are in contact with the bottom surface 10 a of the same planar light guiding plate main body portion 111 , at least one light guiding positioning portion 110 can be ensured.
  • the corresponding positioning gaps 101 are in one-to-one correspondence.
  • the plurality of side walls 100 are located at the side of the bottom surface 10a included in the backboard, the plurality of side walls 100 occupy only the space of the bottom surface 10a in the thickness direction. Therefore, the side edges of the bottom surface 10a are provided with a plurality of side walls 100.
  • the positioning gaps 101 formed by the adjacent two sidewalls of the plurality of sidewalls 100 are on the sides of the bottom surface 10a, so that the positioning gaps 101 formed by the adjacent two sidewalls of the plurality of sidewalls 100 are neither occupied.
  • the space above the backing plate 10 on the bottom surface 10a does not extend the bottom surface 10a. Therefore, when the light guide plate 11 is positioned on the bottom surface 10a, the thickness of the backlight module is not excessively increased, and the area of the bottom surface is not increased.
  • the at least one optical film body portion 121 and the diaphragm positioning portion 120 are located on the same plane.
  • the at least one film positioning portion 120 does not affect the overall thickness of the optical film 12, thereby ensuring the overall thickness of the optical film 12. Thinner.
  • the at least one light guiding positioning portion 110 is in one-to-one correspondence with at least one positioning gap 101
  • at least one of the diaphragm positioning portions 120 is in one-to-one correspondence and at least one.
  • the positioning gap 101 is engaged, at least one positioning gap 101 of one of the at least one light guiding positioning portion 110 and the one of the at least one diaphragm positioning portion 120 may be the same one.
  • the positioning gap 101 may also be a different positioning gap 101.
  • the light guide plate 11 and the optical film 12 have a certain relative motion tendency, resulting in a decrease in backlight quality provided by the backlight module.
  • the at least one light guiding positioning portion 110 and the at least one diaphragm positioning portion 120 share at least one positioning gap 101 in a one-to-one correspondence.
  • one of the at least one diaphragm positioning portion 120 shares a positioning gap 101 with one of the at least one light guiding positioning portion 110.
  • Each of the positioning voids 101 includes a first direction positioning gap 1011 and a second direction positioning gap 1012 that communicate with each other.
  • the orthographic projection of the first direction positioning void 1011 on the plane of the bottom surface 10a and the orthographic projection of the second direction positioning void 1012 on the plane of the bottom surface 10a have a positioning angle.
  • the positioning angle is not equal to 0 and 360°, so that the positioning direction of the first direction positioning gap 1011 and the second direction positioning gap 1012 included in each positioning gap 101 is different.
  • the orthographic projection of the first direction positioning gap 1011 on the plane of the bottom surface 10a can be regarded as a relatively thick straight line. This line is called a straight line in the first direction.
  • the orthographic projection of the second direction positioning gap 1012 on the plane of the bottom surface 10a can also be regarded as a relatively thick straight line. This line is called a straight line in the second direction.
  • the angle between the straight line where the first direction is located and the straight line where the second direction is located is the positioning angle.
  • the at least one light guiding positioning portion 110 is in one-to-one correspondence with at least one positioning gap 101.
  • At least one of the diaphragm positioning portions 120 is engaged with the at least one positioning gap 101 in a one-to-one correspondence.
  • One of the light guiding positioning portions of the at least one light guiding positioning portion 110 is engaged with the first direction positioning gap 1011 included in the positioning gap 101 of the light guiding positioning portion of the at least one light guiding positioning portion 110.
  • One of the at least one diaphragm positioning portion 120 is engaged with the second directional positioning gap 1012 of the positioning gap 101 in which the one of the at least one diaphragm positioning portion 120 is engaged.
  • the first direction positioning gap 1011 included in the positioning gap 101 of the at least one light guiding positioning portion 110 and the one of the at least one light guiding positioning portion 110 is engaged with the first direction positioning gap 1011.
  • One of the at least one diaphragm positioning portion 120 and the positioning gap 101 of the at least one of the at least one diaphragm positioning portion 120 are engaged with the second direction positioning gap 1012, and thus,
  • the first direction and the second direction of the positioning gap 101 when the light guide plate 11 and the optical film 12 have a relative movement tendency, if the light guide plate 11 faces the first direction perpendicular to the one positioning gap 101, The direction of movement, the optical film 12 moves in a direction perpendicular to the corresponding second direction of the one positioning void 101, then the orthographic projection of the gap 1011 in the first direction in the plane of the bottom surface 10a and the second direction positioning gap 1012 are The orthographic projection of the plane of the bottom surface 10a has a positioning angle.
  • the positioning angle is not equal to 0° and 360°, the direction in which the light guide plate 11 and the optical film 12 move is different. Since the direction in which the light guide plate 11 and the optical film 12 move are different, when the light guide plate 11 moves in a direction perpendicular to the corresponding first direction of the one positioning gap 101, the pair of light guide plates 11 are oriented perpendicular to the one positioning gap. The optical film 12 moving in the direction corresponding to the second direction of the 101 generates a certain resistance, so that the light guide plate 11 plays a certain positioning role on the optical film 12.
  • the optical film 12 when the optical film 12 is moved in a direction perpendicular to the corresponding second direction of the one positioning void 101, the optical film 12 is moved in a direction perpendicular to the first direction corresponding to the one positioning void 101.
  • the light guide plate 11 generates a certain resistance, so that the optical film plays a certain positioning role on the light guide plate 11. Therefore, in some embodiments, the angle formed by the first direction of the first positioning direction positioning gap and the second direction of the second positioning direction corresponding to the second positioning direction gap are included in the positioning gap 101.
  • the light guide plate 11 and the optical film 12 cooperate with each other to achieve mutual positioning to reduce the relative relationship between the light guide plate 11 and the optical film 12 when it is not equal to 0° and 360°. Mobile trend.
  • the above-described positioning angle is equal to 75°-135°.
  • the positioning angle not only ensures that the shape of the bottom surface 10a is not greatly affected, but also promotes the mutual positioning of the light guide plate 11 and the optical film 12.
  • each side of the bottom surface in the related art is generally a linear side. If two side walls are provided on the side of the bottom surface in the related art, the positioning gaps 101 formed by the two side walls 100 include the first direction positioning gap 1011 and the second direction positioning gap 1012, and the two side walls are required. The adjacent two side edges of the bottom surface (the extending directions of the two side edges are not stopped), so that the positioning gaps 101 formed by the two side walls include a first direction positioning gap 1011 and a second direction positioning gap 1012.
  • Figures 1 and 2 show a forming structure for positioning the void 101.
  • the positioning gap 102 is located at a corner of the bottom surface 10a.
  • the corner portion of the bottom surface 10a refers to an intersection of two adjacent side edges of the bottom surface 10a.
  • the orientation of the first direction positioning gap 1011 included in the positioning gap 101 on the plane of the bottom surface 10a and the orthogonal projection of the second direction positioning gap 1012 on the plane of the bottom surface 10a are 90°.
  • At least one light guiding positioning portion is different because the opening direction of the first direction positioning gap 1011 and the second direction positioning gap 1012 included in each positioning gap 101 is different.
  • Each of the light guiding positioning portions 110 is a convex light guiding positioning portion.
  • the convex portion of the positioning gap 101 is shared.
  • the convex direction of the light guiding positioning portion is different from the convex direction of the convex diaphragm positioning portion.
  • the light incident surface of the light guide plate 11 is located on the side of the light guide plate 11 and perpendicular to the plane of the plate surface of the light guide plate 11.
  • the convex direction of the convex light guiding positioning portion is parallel to the plane of the plate surface of the light guide plate main body portion 111.
  • the convex direction of the convex light guiding positioning portion is a vector having a direction parallel to the plane of the plate surface of the light guide plate main body portion 111.
  • Each of the diaphragm positioning portions 120 is a convex diaphragm positioning portion.
  • the convex direction of the convex diaphragm positioning portion is parallel to the plate surface of the light guide plate main body portion 111.
  • the convex direction of the convex diaphragm positioning portion is a vector having a direction parallel to the plane of the plate surface of the light guide main body portion 111.
  • the convex direction of the convex light guiding positioning portion 110 that shares the positioning gap 101 with the convex diaphragm positioning portion is perpendicular to the incident surface of the light guide plate 11.
  • the protruding direction of the convex diaphragm positioning portion of the positioning gap 101 shared with the convex light guiding positioning portion is parallel to the incident surface of the light guide plate 11, so that the convex light guiding positioning portion and the convex type can be made
  • the locating angle of the first directional positioning gap 1011 included in the positioning space 101 shared by the diaphragm positioning portion on the plane of the bottom surface 10a and the orthogonal projection of the second direction positioning space 1012 on the plane of the bottom surface 10a are 90 degrees. °.
  • the convex light guiding portion of the positioning gap 101 shared with the convex diaphragm positioning portion 120 is parallel to the incident surface of the light guide plate 11 and the convex guide.
  • the convex direction of the convex diaphragm positioning portion of the positioning recess 101 shared by the optical positioning portion is perpendicular to the incident surface of the light guide plate 11, which enables the convex light guiding positioning portion and the convex diaphragm positioning portion
  • the orthographic projection of the first direction positioning gap 1011 included in the common positioning gap 101 on the plane of the bottom surface 10a and the orthographic projection of the second direction positioning gap 1012 in the plane of the bottom surface 10a form a positioning angle of 90°.
  • the number of the above-mentioned convex light guiding positioning portions is plural, and the number of the above-mentioned convex diaphragm positioning portions is plural.
  • the number of the convex light guiding positioning portions is plural, and the number of the protruding diaphragm positioning portions is plural, at least two of the plurality of convex light guiding positioning portions are convex light guiding positioning portions
  • the convex directions are different, and the convex directions of at least two of the plurality of convex diaphragm positioning portions are different.
  • the effect of the different convex directions of the at least two convex light guiding positioning portions is illustrated by taking a plurality of convex light guiding positioning portions including two convex light guiding positioning portions having different convex directions as an example.
  • the two convex diaphragm positioning portions having different protrusion directions are in one-to-one correspondence with the two convex light guiding positioning portions different in the convex direction.
  • the light guiding plate 11 When the convex directions of the two convex light guiding positioning portions are different, if the light guiding plate moves, the light guiding plate 11 not only moves toward the convex direction of the first convex light guiding positioning portion, but also has a direction a tendency of the convex direction of the second convex light guiding positioning portion to move so that the force of the light guiding plate moving toward the convex direction of the first convex light guiding positioning portion and the light guide plate toward the second The forces in which the convex light guiding positioning portions move in the convex direction cancel each other, thereby reducing the probability of movement of the light guide plate 11.
  • the probability of moving the optical film 12 can also be reduced.
  • the following three configurations can be employed to reduce the probability of movement of the light guide plate 11 and the mobility of the optical film 12, but are not limited to the following three configurations.
  • the first structure along the circumferential direction of the side surface of the light guide plate main body portion 111, the convex direction of each of the plurality of convex light guiding positioning portions changes clockwise; along the optical film main body In the circumferential direction of the side surface of the portion 121, the convex direction of each of the plurality of convex diaphragm positioning portions changes clockwise.
  • a second structure along a circumferential direction of a side surface of the light guide plate main body portion 111, a convex direction of each of the plurality of convex light guiding positioning portions is changed counterclockwise; along the optical film main body In the circumferential direction of the side surface of the portion 121, the convex directions of the respective convex diaphragm positioning portions of the plurality of convex diaphragm positioning portions are changed counterclockwise.
  • a third structure along the circumferential direction of the side surface of the light guide plate main body portion 111, the convex directions of the respective convex light guiding positioning portions of the plurality of convex light guiding positioning portions are alternately changed; along the optical film main body portion In the circumferential direction of the side surface of the 121, the convex directions of the respective convex diaphragm positioning portions of the plurality of convex diaphragm positioning portions are alternately changed.
  • the light guide plate 11 and the optical film 12 can be moved in more directions.
  • the direction of the force applied to the light guide plate 11 and the optical film 12 is relatively large, so that the respective directions of the light guide plate 11 and the optical film 12 are directed.
  • the mutual offset can be sufficiently canceled to further reduce the probability of movement of the light guide plate 11 and the optical film 12.
  • FIG. 8 shows a light guide plate 11 including a light guide plate main body portion 111 and four convex light guiding positioning portions, and the four convex light guiding positioning portions are respectively first convex portions.
  • the light guiding positioning portion 110a upper left corner
  • the second convex light guiding positioning portion 11b upper right corner
  • the third convex light guiding positioning portion 110c lower right corner
  • the fourth convex light guiding positioning Part 110d lower left corner
  • the convex direction of the first convex light guiding positioning portion 110a is toward the upper side direction of FIG. 8
  • the convex direction of the second convex light guiding positioning portion 110b is directed toward the left side shown in FIG.
  • the convex direction of the third convex light guiding positioning portion 110c is directed to the left direction shown in FIG. 8, and the convex direction of the fourth convex light guiding positioning portion 110d is directed to the right direction shown in FIG. .
  • the backing plate 10 includes a bottom surface 10a of a rectangular structure and four side walls 100.
  • the four side walls 100 are a first side wall 100a, a second side wall 100b, a third side wall 100c, and a fourth side wall 100d, respectively.
  • the first side wall 100a is located on the left side of the bottom surface 10a shown in FIGS. 3 and 6
  • the second side wall 100b is located on the upper side of the bottom surface 10a shown in FIGS. 3 and 4
  • the third side wall 100c is located as shown in the figure. 4 and the right side of the side wall shown in FIG. 5,
  • the fourth side wall 100d is located on the lower side of the bottom surface 10a shown in FIGS. 6 and 7.
  • the first convex light guiding positioning portion 110a is engaged with the first positioning gap formed by the first side wall 100a and the second side wall 100b toward the upper direction of FIG.
  • the second convex light guiding positioning portion 110b is engaged with the second positioning gap formed by the second side wall 100b and the third side wall 100c in the right direction of FIG.
  • the third convex light guiding positioning portion 110c is engaged with the third positioning gap formed by the third side wall 100c and the fourth side wall 100d in the right direction of FIG.
  • the fourth convex light guiding positioning portion 110d is engaged with the fourth positioning gap formed by the fourth side wall 100d and the first side wall 100a in the left direction of FIG.
  • the optical film includes an optical film main body portion 121 and four film positioning portions 120 (see Fig. 7).
  • the four diaphragm positioning portions 120 are respectively a first convex diaphragm positioning portion 120a, a second convex diaphragm positioning portion 120b, a third convex diaphragm positioning portion 120c, and a fourth convex diaphragm positioning portion. Part 120d.
  • the convex direction of the first convex diaphragm positioning portion 120a is directed to the left direction of FIG.
  • the convex direction of the second convex diaphragm positioning portion 120b is directed to the upper side direction shown in FIG.
  • the convex direction of the third convex diaphragm positioning portion 120c faces the lower side direction shown in FIG.
  • the convex direction of the fourth convex diaphragm positioning portion 120d faces the lower side direction shown in FIG.
  • Figure 7 shows only the mating relationship of a diaphragm boss 120 with the positioning gap 101.
  • the positioning angle formed by the orthographic projection of the convex diaphragm positioning portion and the convex light guiding positioning portion of the same positioning gap 101 in the plane of the bottom surface 10a is analyzed. It can be seen that when the shape of the bottom surface 10a is rectangular, and the adjacent two sidewalls of the plurality of sidewalls 100 forming the positioning gap 101 are located on two adjacent sides of the bottom surface 10a, if the positioning angle is 90°, then The protruding direction of the convex diaphragm positioning portion is perpendicular to the protruding direction of the convex light guiding positioning portion.
  • the protruding direction of the convex diaphragm positioning portion is perpendicular to the protruding direction of the convex light guiding positioning portion, when the optical film 12, the light guide plate 11, and the back plate 10 are fitted together, the first protrusion
  • the first positioning gap formed by the first side wall 100a and the second side wall 100b is engaged with the first diaphragm 100a and the second side wall 100b.
  • the second convex diaphragm positioning portion 120b faces the FIG.
  • the upper side direction is engaged with the second positioning gap formed by the second side wall 100b and the third side wall 100c
  • the third convex diaphragm positioning portion 120c is engaged with the third side wall 100c toward the lower side of FIG.
  • a third positioning gap formed by the fourth side wall 100d, the fourth convex type film positioning portion 120d is engaged with the fourth side wall 100d and the fourth side wall 100a to form a fourth positioning direction toward the lower side direction of FIG. Void.
  • the side surface of the light guide plate main body portion 111 and the plurality of sidewalls 100 there is a first buffer space 1321 between each of the side walls.
  • a second buffer space 1322 is defined between a side surface of the optical film main body portion 121 and each of the plurality of side walls 100.
  • the first buffer space 1321, the second buffer space 1322, and each of the plurality of side walls 100 are in one-to-one correspondence.
  • the first buffer space 1321 corresponding to each of the plurality of side walls 100 communicates with the second buffer space 1322 and constitutes a buffer receiving area 1320.
  • An inner buffer sheet 132 is disposed in the buffer receiving area 1320.
  • the side surface of the light guide plate main body portion 111 and each of the plurality of side walls 100 have a first buffer space 1321, between the side surface of the optical film main body portion 121 and each of the plurality of side walls 100 Each has a second buffer space 1322, and the first buffer space 1321 and the second buffer space 1322 corresponding to the same sidewall communicate with each other to form a buffer receiving area 1320, so that the inner buffer sheet 132 is disposed in the buffer receiving area 1320, and therefore, When the light plate 11 and the optical film 12 are moved, the light guide plate 11 and the optical film 12 are prevented from directly colliding with at least one of the plurality of side walls 100 through the inner buffer sheet 132, so that the inner buffer sheet 132 buffers the light guide plate.
  • the inner buffer sheet 132 can buffer the force of the light guide plate 11 and the optical film 12 striking at least one of the plurality of side walls 100, at least one of the plurality of side walls 100 faces the light guide plate 11 and the optical film.
  • the reaction force of the sheet 12 is weakened. Therefore, providing the inner buffer sheet 132 in the buffer receiving area can also cause the backlight module to reduce at least one of the plurality of side walls 100 to the light guide plate 11 and the optical film 12 during use. The degree of wear.
  • the backlight module 1 further includes a plastic frame 13 .
  • the plastic frame 13 includes a plastic frame body 130 and at least one outer buffer sheet 131. At least one outer buffer sheet 131 is in one-to-one correspondence with at least one inner buffer sheet 132. At least one outer buffer sheet 131 and at least one inner buffer sheet 132 are disposed on the same surface of the plastic frame main body 130.
  • Each of the outer frame buffer 130 and the at least one inner buffer sheet 132 of the at least one outer buffer sheet 131 forms a side wall embedded gap 130a having an insertion opening. At least one of the plurality of side walls 100 is correspondingly inserted into the at least one side wall into the gap 130a through the insertion opening.
  • the plastic frame main body 130 is located in a direction in which the optical film 12 faces away from the light-emitting surface of the light guide plate 11 (the light guide plate 11 and the optical film 12 are not shown in FIG. 12).
  • the position of the plastic frame main body 130 is a light shielding area BM, and the plastic frame main body 130 is a plastic frame main body of a ring structure.
  • the area enclosed by the frame body of the annular structure is a light-transmitting area for the light guided by the light guide plate 11 and the optical film 12 to pass.
  • each of the at least one outer buffer sheet 131 and the corresponding inner buffer sheet of the at least one inner buffer sheet 132 form a side wall embedded void 130a having an insertion opening.
  • At least one of the plurality of side walls 100 is correspondingly inserted into the side wall into the gap 130a through the insertion opening, so that the side wall insertion gap 130a can protect the side wall 100 embedded in the side wall into the gap 130a.
  • the material used for the plastic frame 13 generally has a buffering function, and therefore, the same can be used.
  • the cushioning material completes the fabrication of the at least one outer buffer sheet 131, the at least one inner buffer sheet 132, and the plastic frame main body 130 in one time by an integral molding process to simplify the manufacturing process of the backlight module 1.
  • some embodiments of the present disclosure also provide a display device 3.
  • the display device includes the backlight module 1 described above.
  • the beneficial effects of the display device provided by the embodiment of the present disclosure are the same as those of the backlight module described above, and are not described herein.
  • the display device may be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, or a navigator.
  • a display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, or a navigator.
  • the above display device 3 generally further includes a display panel 2.
  • the plastic frame 13 in the backlight module further includes a protective cover 133.
  • the protective cover 133 is disposed on a surface of the plastic frame main body 130 where the inner cushion sheet 132 is not formed, so that the display panel 2 is located inside the protective cover 133. Since the display panel 2 is located in the protective cover 133, the protective cover 133 can not only protect the display panel 2 but also the connection portion of the backlight module and the display panel 2, thereby preventing the light provided by the backlight module to the display panel 2. Light leaks at the connection.
  • the protective cover 133 is generally made of a buffer material
  • the plastic frame body 130, the inner buffer sheet 132, and the outer buffer sheet 131 can also be made of a buffer material, and thus, The integral molding process completes the production of the protective cover 133, the plastic frame main body 130, the inner buffer sheet 132, and the outer cushion sheet 131.
  • the light shielding area BM of the display panel 2 and the frame area of the backlight module correspond to at least the position of the frame body 130 in the backlight module.
  • the frame area of the display panel 2 corresponds to the position of the light shielding area BM of the backlight module.
  • the front projection of the frame region of the display panel 2 and the edge of the light guide plate 11 partially overlap with the edge of the light guide plate 11 to ensure that the light guide plate at the protruding portion of the convex light guide positioning portion of the light guide plate 11 is located at the light shielding plate. Area.

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Abstract

一种背光模组包括背板（10），以及位于背板（10）上的导光板（11），背板（10）包括底面（10a）和多个侧壁（100），相邻两个侧壁（100）之间形成定位空隙（101）；导光板（11）包括导光板主体部（111）以及至少一个设在导光板主体部（111）侧面的导光定位部（110），导光定位部（110）与定位空隙（101）卡合。

Description

背光模组及显示装置
本申请要求于2017年8月31日提交中国专利局、申请号为201721114823.2、发明名称为“一种背光模组及显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及显示技术领域，尤其涉及一种背光模组及显示装置。
背景技术
液晶显示装置是一种被动发光的平板显示设备，其耗电量低、辐射小，具有良好的显示效果，已经成为市场上的主流产品。
发明内容
本公开第一方面提供了一种背光模组。该背光模组包括背板和导光板，所述导光板和所述背板层叠的设在一起；所述背板包括底面以及位于所述底面的侧边的多个侧壁，所述多个侧壁中相邻两个所述侧壁之间形成定位空隙；所述导光板包括导光板主体部以及至少一个设在所述导光板主体部的侧面的导光定位部，所述导光定位部与所述定位空隙卡合。
在一些实施例中，所述背光模组还包括光学膜片，所述光学膜片位于所述导光板的出光面；所述光学膜片包括光学膜片主体部以及至少一个设在所述光学膜片主体部的膜片定位部；所述膜片定位部与所述定位空隙卡合。
在一些实施例中，所述膜片定位部在所述底面所在平面的正投影与所述膜片定位部所卡合的所述定位空隙在所述底面所在平面的正投影交叠，所述导光定位部在所述底面所在平面的正投影与所述导光定位部所卡合的所述定位空隙在所述底面所在平面的正投影交叠。
在一些实施例中，所述定位空隙的厚度与形成所述定位空隙的相邻两个侧壁的壁厚相同，所述定位空隙的厚度方向与形成所述定位空隙的所述相邻两个侧壁的壁厚方向相同；所述导光定位部在所述底面 所在平面的正投影的外边缘线位于所述导光定位部所卡合的所述定位空隙在所述底面所在平面的正投影内；所述膜片定位部在所述底面所在平面的正投影的外边缘线位于相邻所述膜片定位部所卡合的所述定位空隙在所述底面所在平面的正投影内。
在一些实施例中，至少一个导光定位部一一对应的与至少一个定位空隙卡合，至少一个膜片定位部一一对应的与至少一个定位空隙卡合。
在一些实施例中，所述多个侧壁中每个侧壁所在平面与所述底面所在平面垂直，所述导光定位部和所述导光板主体部位于同一平面，所述光学膜片主体部和所述膜片定位部位于同一平面。
在一些实施例中，每个所述定位空隙包括相互连通的第一方向定位空隙和第二方向定位空隙，所述第一方向定位空隙和第二方向定位空隙连通；每个所述定位空隙包括的所述第一方向定位空隙在底面所在平面的正投影与所述第二方向定位空隙在底面所在平面的正投影具有定位夹角，所述定位夹角等于75°-135°；至少一个膜片定位部中的一个膜片定位部与至少一个导光定位部中的一个导光定位部共用一个定位空隙，所述至少一个导光定位部中一个导光定位部与所述至少一个导光定位部中一个导光定位部所卡合的所述定位空隙包括的第一方向定位空隙卡合，所述至少一个膜片定位部中一个膜片定位部与所述至少一个膜片定位部中一个膜片定位部所卡合的所述定位空隙包括的第二方向定位空隙卡合。
在一些实施例中，至少一个导光定位部和至少一个膜片定位部一一对应的共用至少一个定位空隙。
在一些实施例中，所述至少一个导光定位部中每个导光定位部为凸起式导光定位部，所述至少一个膜片定位部中每个膜片定位部为凸起式膜片定位部；共用所述定位空隙的所述凸起式导光定位部的凸起方向和所述凸起式膜片定位部的凸起方向不同。
在一些实施例中，所述至少一个导光定位部中每个导光定位部为凸起式导光定位部，所述至少一个导光定位部中每个凸起式导光定位 部的凸起方向与所述导光板主体部的板面平行；所述至少一个膜片定位部中每个膜片定位部为凸起式膜片定位部，所述至少一个膜片定位部中每个凸起式膜片定位部的凸起方向与所述导光板主体部的板面平行；与所述凸起式膜片定位部共用所述定位空隙的所述凸起式导光定位部的凸起方向垂直于所述导光板的入射面，与所述凸起式导光定位部共用所述定位空隙的所述凸起式膜片定位部的凸起方向平行于所述导光板的入射面；或，与所述凸起式膜片定位部共用所述定位空隙的所述凸起式导光部的凸起方向平行于所述导光板的入射面，与所述凸起式导光部共用所述定位空隙的所述凸起式膜片定位部的凸起方向垂直于所述导光板的入射面。
在一些实施例中，所述凸起式导光定位部的数量为多个，所述凸起式膜片定位部的数量为多个；多个凸起式导光定位部中至少两个凸起式导光定位部的凸起方向不同，多个凸起式膜片定位部中至少两个所述凸起式膜片定位部的凸起方向不同。
在一些实施例中，沿着所述导光板主体部侧面的周向方向，多个凸起式导光定位部中各个所述凸起式导光定位部的凸起方向顺时针变化、逆时针变化或交替变化；沿着所述光学膜片主体部侧面的周向方向，多个凸起式膜片定位部中各个所述凸起式膜片定位部的凸起方向顺时针变化、逆时针变化或交替变化。
在一些实施例中，所述背光模组还包括胶框，其中，所述导光板主体部的侧面与所述多个侧壁中的每个侧壁之间均具有第一缓冲空间，所述光学膜片主体部的侧面与所述多个侧壁中的每个侧壁之间均具有第二缓冲空间，所述第一缓冲空间、所述第二缓冲空间以及所述多个侧壁中每个侧壁一一对应，所述多个侧壁中每个侧壁所对应的第一缓冲空间和第二缓冲空间连通并构成缓冲容纳区，所述缓冲容纳区中设有内缓冲片；所述胶框包括胶框主体和至少一个外缓冲片，所述至少一个外缓冲片与至少一个内缓冲片一一对应；所述至少一个外缓冲片和所述至少一个内缓冲片设在所述胶框主体的同一表面；所述胶框主体、所述至少一个外缓冲片中每个外缓冲片和所述至少一个内缓冲片中相应的内缓 冲片形成具有嵌入口的侧壁嵌入空隙，所述多个侧壁中至少一个侧壁一一对应的通过所述嵌入口伸入至少一个侧壁嵌入空隙中。
在一些实施例中，所述光学膜片的层数为多层，多层光学膜片中每层光学膜片设有对位标记孔，所述多层光学膜片中各层光学膜片所设有的对位标记孔在底面所在平面的正投影相互独立。
在一些实施例中，所述导光板为侧入式导光板，所述背光模组包括遮光区域和透光区域，所述导光定位部上分布有位于所述透光区域和遮光区域的导光板网点，所述导光板网点位于所述透光区域和遮光区域。
本公开第二方面还提供了一种显示装置，该显示装置包括所述背光模组。
在一些实施例中，所述显示装置还包括显示面板，其中，所述背光模组中的胶框还包括保护套；所述保护套设在所述胶框主体没有形成所述内缓冲片的表面，所述显示面板位于所述保护套内。
附图说明
此处所说明的附图用来提供对本公开的进一步理解，构成本公开的一部分，本公开的示意性实施例及其说明用于解释本公开，并不构成对本公开的不当限定。在附图中：
图1为本公开一些实施例中背板的结构示意图。
图2为本公开一些实施例中背板与导光板的配合示意图。
图3为图2的左上角结构放大图。
图4为图2的右上角结构放大图。
图5为图2右下角结构放大图。
图6为图2左下角结构放大图。
图7为本公开一些实施例中背板、导光板与光学膜片的配合示意图。
图8为本公开一些实施例中导光板的结构示意图。
图9为本公开一些实施例中导光板上的导光板网点的分布示意图；
图10为本公开一些实施例中光学膜片的结构示意图。
图11为本公开一些实施例中光学膜片所开设的定位标记孔的位置示意图；
图12为本公开一些实施例中胶框与背板的配合示意图；
图13为本公开一些实施例中胶框的结构示意图。
图14为本公开一些实施例提供的背光模组的侧视图。
图15为本公开一些实施例中缓冲容纳区的结构示意图。
图16为本公开一些实施例提供的显示装置的结构示意图。
具体实施方式
下面将结合本公开实施例中的附图，对本公开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公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
相关技术中液晶显示装置包括背光模组以及设在背光模组出光面的显示面板。背光模组作为光源向显示面板提供光线。显示面板将所述光线图像化，以达到图像显示的目的。背光模组一般包括背板，以及设在背板上的导光板。所述背板的底面设有类似定位柱的定位结构，以使得导光板定位在背板上，从而保证显示面板所显示的图像稳定。
虽然，上述底面设置有保证显示面板所显示的图像稳定的定位结构，但是由于背板的底面所设置的定位结构在显示面板的投影必须位于显示面板的边框部分，以保证定位结构不影响显示面板的图像显示，因此，显示面板的边框部分的宽度受到背板的底面所设置的定位结构尺寸的限制，这对于液晶显示装置的窄边框化不利。
针对上述问题，请参阅图1-图3、图14和图15，本公开实施例提供的背光模组1包括背板10和导光板11。导光板10和背板10层叠的设在一起。背板10包括底面10a，以及位于底面10a的侧边的多个侧壁100。该多个侧壁100可位于底面10a的同一侧边，也可以位 于底面10a的不同侧边。该多个侧壁100中相邻两个侧壁100之间形成定位空隙101。导光板11包括导光板主体部111以及至少一个设在导光板主体部111的侧面的导光定位部110。该导光定位部110与定位空隙101一一对应卡合。
可以理解的是，如图1所示，多个侧壁100中每两个侧壁100之间形成一个定位空隙101。至于侧壁100的数量可根据导光定位部110的数量设定。如图2所示，导光定位部110可采用与导光板主体部111相同材料制成，使得在导光板11为侧入式导光板时，光线可在同一材质的导光板主体部111和导光板定位部110传输，避免因为导光板主体部111和导光板定位部110材料不同所导致的导光均一性差的问题。另外，上述背板10与导光板11之间一般需要设置反射片(图1-图16未示出)，以反射导光板11射向背板10所在方向的光线，使得被反射片所反射的光线重新被导光板11导光，从而达到光线充分利用的目的。
由于如图1、图2和图16所示，上述多个侧壁100中多个侧壁100中相邻两个侧壁之间形成定位空隙101，上述导光板11所包含的导光板主体部111的侧面设置至少一个导光定位部110。当导光定位部110与定位空隙101一一对应卡合，那么将导光板11安装到背板10时，导光板主体部111与上述底面10a接触，导光定位部110与对应的定位空隙101合即可将导光板11定位在背板10上。由于定位空隙101位于底面10a的侧边所设置的多个侧壁100中相邻两个侧壁之间，这使得导光板11定位在背板10时，可充分利用位于底面10a的侧边所设置的多个侧壁100中相邻两个侧壁之间已有的空间作为定位空隙101，而不需要在底面10a上额外增加定位结构将导光板定位在背板上，因此，上述背光模组1应用于显示装置3时，作为定位结构的定位空隙101不会限制显示面板2边框部的宽度，有利于显示装置3的窄边框化。
在一些实施例中，如图1和图2所示，上述定位空隙101从结构上来说是通过上述多个侧壁100中相邻两个侧壁形成的。从制作方法 上来说，是在已有的背板10的侧壁开设多个作为定位空隙101的空隙，并使得这些空隙间隔设置，以保证从结构来看一个孔隙的两侧各有一个侧壁100。换句话说，当在已有的背板侧壁开设多个间隔设置的空隙时，多个侧壁100中相邻两个侧壁之间形成一个定位空隙101。因此，本公开中的定位空隙101的厚度实质与形成该定位空隙101的相邻两个侧壁100的臂厚相同，且定位空隙101的厚度方向与形成对应该定位空隙101的相邻两个侧壁100的壁厚方向相同。
相关技术中背板的侧壁是绕着背板所包括的底面的侧边一周设置的封闭式回转结构。该封闭式回转结构沿着垂直于回转轴线的面的剖视形状由底面形状决定。例如：如果底面形状为矩形，则该封闭式回转结构沿着垂直于回转轴线的面的剖视形状为矩形。如果底面形状为圆形结构，则该封闭式回转结构沿着垂直于回转轴线的面的剖视形状为圆形。
在一些实施例中，如图1-图6所示，上述导光定位部110在底面10a所在平面的正投影与该导光定位部所卡合的定位空隙101在底面10a所在平面的正投影交叠，可保证导光定位部110与相应的定位空隙101卡合。当上述导光定位部110在底面10a所在平面的正投影与该导光定位部所卡合的定位空隙101在底面10a所在平面的正投影交叠时，有两种如下实现方式。
在一种实现方式中，如图1-图5所示，上述导光定位部110在底面10a所在平面的正投影的外边缘线位于该导光定位部110所卡合的定位空隙101在底面10a所在平面的正投影内。换句话说，上述导光定位部110的最外端位于与该导光定位部110所卡合的定位空隙101相邻的两个侧壁100的外侧面所在平面以内的区域，以减小导光定位部110对背光模组的边框区域的空间占据，使得背光模组的边框区域比较窄。
在另一种实现方式中，如图1、图2和图6所示，上述导光定位部110在所述底面10a所在平面的正投影的外边缘线超过所述导光定位部110所卡合的定位空隙101在底面10a所在平面的正投影的外边 缘。换句话说，上述导光定位部110的最外端位于与该导光定位部110所卡合的定位空隙101相邻的两个侧壁100的外侧面所在平面以外的区域，使得导光定位部110的最外端超出该导光定位部110所卡合的定位空隙101相邻的两个侧壁100的外侧面所在平面。但是，当导光定位部110的最外端超出该导光定位部110所卡合的定位空隙101相邻的两个侧壁100的外侧面所在平面，导光定位部110会增加背光模组的边框区域的宽度。
如图1、图2、图6、图7、图9和图16所示，当上述导光定位部110的最外端、与该导光定位部110所卡合的定位空隙101相邻的两个侧壁100的外侧面所在平面平齐时，如果导光板11为侧入式导光板，那么光线进入导光板11内部后，在导光定位部110的最外端会发生全反射而进入到显示装置3的显示区域，使得用户看到的显示装置3所显示显示图像对应导光定位部110位置发亮。为了避免该问题，上述导光定位部110的最外端超出与该导光定位部110所卡合的定位空隙101相邻的两个侧壁100的外侧面所在平面。上述导光板主体部111和至少一个导光定位部110上均分布有导光板网点11a。这些导光板网点11a不仅分布在导光板11对应背光模组1的透光区域AA，而且还分布在导光板11对应背光模组1的遮光区域BM。
如图2、图9和图16所示，由于上述导光板网点11a不仅分布在导光板11对应背光模组1的透光区域AA，而且还分布在导光板11对应背光模组1的遮光区域BM因此，当光线进入导光板11后，在导光定位部110的网点处发生散射，使得散射后的一部分光线被反射到遮光区域BM，从而减少用户看到的显示装置3所显示的图像对应导光定位部110位置的亮度。
在一些实施例中，如图7和图10所示，上述背光模组还包括光学膜片12。当该光学膜片12设在上述导光板11远离所述背板的表面时，该光学膜片12一般位于导光板11的出光面。
在一些实施例中，如图7、图10和图14所示，为了保证光学膜片12很好的定位在导光板11的出光面，该光学膜片12包括光学膜 片主体部121以及至少一个设在光学膜片主体部121的膜片定位部120。至少一个膜片定位部120一一对应的与定位空隙101卡合。该至少一个膜片定位部120可采用与至少一个光学膜片12相同材质制成。
在一些实施例中，如图7和图14所示，当上述多个侧壁100包括两个侧壁100时，这两个侧壁100之间具有一个定位空隙101。相应的，该光学膜片12中所含有的膜片定位部120的数量为一个。
在一些实施例中，如图7和图11所示，当上述光学膜片12的层数为多层时，多层光学膜片12中每层光学膜片设有对位标记孔12a。为了避免多层光学膜片12中各层光学膜片的对位标记孔12a在底面10a的正投影重合时，显示装置3所显示的图像对应对位标记孔12a的位置发暗的问题(这种问题被称为光学换面不均匀的问题)，上述多层光学膜片12中各层光学膜片12的对位标记孔12a在底面10a所在平面的正投影相互独立，这样可降低显示装置3所显示的图像对应对位标记孔12a的位置的暗度，从而缓解显示装置3因为光学换面不均匀所导致的显示装置3所显示的图像质量不佳的问题。
例如：上述光学膜片12包括层叠设置的棱镜片和扩散片。在该棱镜片和扩散片上均开设棱镜片对位标记孔12a。当该棱镜片上所开设的对位标记孔12a和该扩散片上所开设的对位标记孔12a在上述底面10a所在平面的正投影相互独立时，该棱镜片上所开设的对位标记孔12a和该扩散片上所开设的对位标记孔12a在上述底面10a所在平面的正投影没有重合或重叠，这样就可以缓解该棱镜片和该扩散片光学换面不均所导致的显示装置3所显示的图像质量不佳的问题。至于棱镜片和扩散片的位置关系，根据实际需要设定，在此不做限定。
在一些实施例中，如图1、图2和图7所示，上述膜片定位部120在上述底面10a所在平面的正投影与该膜片定位部120所卡合的定位空隙101在底面10a所在平面的正投影交叠，以保证膜片定位部120可卡合在相应的定位空隙101中。由于每个定位空隙101由多个侧壁100中相邻两个侧壁形成，因此，可利用多个侧壁100中相邻两个侧 壁所形成的一个定位空隙101与光学膜片12所包括的一个膜片定位部120卡合，使得上述多个侧壁100中相邻两个侧壁所形成的定位空隙101对光学膜片12进行定位。
在一些实施例中，如图1、图7和图14所示，上述膜片定位部120在底面10a所在平面的正投影与该膜片定位部120所卡合的定位空隙101在底面10a所在平面的正投影交叠。当上述膜片定位部120在底面10a所在平面的正投影与该膜片定位部120所卡合的定位空隙101在底面10a所在平面的正投影交叠时，有如下两种实现方式。
在一种实现方式中，如图1、图7和图14所示，上述膜片定位部120在上述底面10a所在平面的正投影的外边缘线位于与该膜片定位部120所卡合的定位空隙101在底面10a所在平面的正投影内。换句话说，当膜片定位部120在底面10a所在平面的正投影的外边缘线位于该膜片定位部120所卡合的定位空隙101在底面10a所在平面的正投影内时，该膜片定位部120的最外端位于与该膜片定位部120所卡合的定位空隙101相邻的两个侧壁100的外侧面所在平面以内的区域，使得膜片定位部120可减少对背光模组的边框区域的空间占据。由于该膜片定位部120可减少对背光模组的边框区域的空间占据因此，上述膜片定位部120在上述底面10a所在平面的正投影的外边缘线位于该膜片定位部120所卡合的定位空隙101在底面10a所在平面的正投影内，有利于背光模组的边框区域窄化；
在另一种实现方式中，如图1、图7和图14所示，上述膜片定位部120在底面10a所在平面的正投影的外边缘线超过该膜片定位部120所卡合的定位空隙101在底面10a所在平面的正投影的外边缘。换句话说，当上述膜片定位部120在底面10a所在平面的正投影的外边缘线超过该膜片定位部120所卡合的定位空隙101在底面10a所在平面的正投影的外边缘时，该膜片定位部120的最外端超出与膜片定位部120所卡合的定位空隙101相邻的两个侧壁100的外侧面所在平面，会使得该膜片定位部120增大背光模组的边框区域，导致背光模组的边框区域的宽度略有增加。
在一些实施例中，如图1、图2和图7所示，当上述至少一个膜片定位部120一一对应的与至少一个定位空隙101卡合时，形成该膜片定位部120所卡合的定位空隙101的多个侧壁100中相邻两个侧壁的高度至少大于上述导光板11的厚度，以使得多个侧壁100中相邻两个侧壁所形成的定位空隙101在与对应导光定位部110卡合后，在多个侧壁100中相邻两个侧壁的高度方向还有剩余位置以用于卡合对应膜片定位部120。可以理解的是，该实施例多个侧壁100中相邻两个侧壁的高度方向分别与导光板11的厚度方向和光学膜片12的厚度方向相同。
示例性地，如图1、图7和图14所示，为了更好的定位光学膜片12，形成上述定位空隙101的多个侧壁100中相邻两个侧壁的高度至少等于上述导光板11的厚度和上述光学膜片12的厚度之和。但，为了减少上述多个侧壁100中每个侧壁的高度对背光模组的厚度影响，形成定位空隙101的多个侧壁100中相邻两个侧壁的高度等于该导光板11的厚度和该光学膜片12的厚度之和，7以在保证导光板11和光学膜片12定位准确性的同时，减少对背光模组1的厚度的影响，使得背光模组1具有向轻薄化发展的潜力。
在一些实施例中，如图1和图12所示，上述多个侧壁100中每个侧壁所在平面与上述底面10a所在平面垂直。如图1、图2和图8所示，上述导光定位部110和上述导光板主体部111位于同一平面导光板主体部111与底面10a接触后，即可保证至少一个导光定位部110与相应的定位空隙101一一对应卡合。
由于上述多个侧壁100处在背板所包括的底面10a的侧边，使得多个侧壁100仅占据底面10a在厚度方向的空间，因此，该底面10a的侧边设置多个侧壁100时，多个侧壁100中相邻两个侧壁所形成的定位空隙101处在底面10a的侧边，使得多个侧壁100中相邻两个侧壁所形成的定位空隙101既没有占据底面10a所在背板10的上方空间，也没有对底面10a进行外延。因此，当导光板11定位到底面10a上，不会过多的增加背光模组的厚度，也不会增大底面的面积。
在一些实施例中，如图1-图11所示，上述至少一个光学膜片主体部121和膜片定位部120位于同一平面。当至少一个光学膜片主体部121和膜片定位部120位于同一平面时，至少一个膜片定位部120不会对光学膜片12的整体厚度产生影响，从而保证了光学膜片12的整体厚度比较薄。
在一些实施例中，如图2-图11所示，上述至少一个导光定位部110一一对应的与至少一个定位空隙101卡合，至少一个膜片定位部120一一对应的与至少一个定位空隙101卡合时，至少一个导光定位部110中的一个光学膜片定位部与至少一个膜片定位部120中一个导光板凸起部所卡合的至少一个定位空隙101可以是同一个定位空隙101，也可以是不同的定位空隙101。
在一些实施例中，如图1-图6所示，上述导光板11和上述光学膜片12具有一定的相对运动趋势，导致背光模组所提供的背光质量下降。为了避免这种问题的发生，上述至少一个导光定位部110和至少一个膜片定位部120一一对应的共用至少一个定位空隙101。换句话说，至少一个膜片定位部120中的一个膜片定位部120与上述至少一个导光定位部110中一个导光定位部共用一个定位空隙101。每个定位空隙101包括相互连通的第一方向定位空隙1011和第二方向定位空隙1012。该第一方向定位空隙1011在底面10a所在平面的正投影与第二方向定位空隙1012在底面10a所在平面的正投影具有定位夹角。该定位夹角不等于0和360°，使得每个定位空隙101包括的第一方向定位空隙1011和第二方向定位空隙1012的开设方向不同。
可以理解的是，如图1所示，上述第一方向定位空隙1011在底面10a所在平面的正投影可以看作是一条比较粗的直线。该直线被称为第一方向直线。同样的，上述第二方向定位空隙1012在底面10a所在平面的正投影同样可以看作一条比较粗的直线。该直线被称为第二方向直线。该第一方向所在直线和第二方向所在直线所呈的夹角为定位夹角。
示例性地，如图7和图11所示，当上述膜片定位部120与导光 定位部110一一对应时，上述至少一个导光定位部110一一对应的与至少一个定位空隙101卡合，至少一个膜片定位部120一一对应的与至少一个定位空隙101卡合。该至少一个导光定位部110中一个导光定位部与所述至少一个导光定位部110中一个导光定位部所卡合的定位空隙101包括的第一方向定位空隙1011卡合。该至少一个膜片定位部120中一个膜片定位部与所述至少一个膜片定位部120中一个膜片定位部所卡合的定位空隙101包括的第二方向定位空隙1012卡合。
由于上述至少一个导光定位部110中一个导光定位部与所述至少一个导光定位部110中一个导光定位部所卡合的定位空隙101包括的第一方向定位空隙1011卡合，上述至少一个膜片定位部120中一个膜片定位部与所述至少一个膜片定位部120中一个膜片定位部所卡合的定位空隙101包括的第二方向定位空隙1012卡合，因此，对于一个定位空隙101相应的第一方向和第二方向来说，当导光板11和光学膜片12有相对运动的趋势时，如果导光板11朝着垂直于该一个定位空隙101相应的第一方向的方向移动，光学膜片12朝着垂直于该一个定位空隙101相应的第二方向的方向移动，那么在第一方向定位空隙1011在底面10a所在平面的正投影与第二方向定位空隙1012在底面10a所在平面的正投影具有定位夹角，该定位夹角不等于0°和360°时，导光板11与光学膜片12移动的方向不同。由于导光板11与光学膜片12移动的方向不同因此，当导光板11朝着垂直于该一个定位空隙101相应的第一方向的方向移动时，导光板11对朝着垂直于该一个定位空隙101相应的第二方向的方向移动的光学膜片12产生一定的阻力，使得导光板11对光学膜片12起到一定的定位作用。同理，当光学膜片12朝着垂直于该一个定位空隙101相应的第二方向的方向移动时，光学膜片12对朝着垂直于该一个定位空隙101相应的第一方向的方向移动的导光板11产生一定的阻力，从而使得光学膜片对导光板11起到一定的定位作用。由此可知，在一些实施例中，当上述定位空隙101所包括的第一定位方向定位空隙相应的第一方向所在直线和第二定位方向定位空隙相应的第二方向所在直线所 形成的夹角不等于0°和360°时，如果导光板11和光学膜片12发生相对移动，那么导光板11和光学膜片12相互配合可实现彼此定位，以降低导光板11和光学膜片12的相对移动趋势。
在一些实施例中，如图1所示，上述定位夹角等于75°-135°。当定位夹角等于75°-135°时，该定位夹角不仅保证了上述底面10a的形状不会受到太大的影响，而且还可以促进导光板11和光学膜片12的彼此定位作用。
在一些实施例中，对于相关技术中的底面来说，该相关技术中的底面的每条侧边一般为直线型侧边。如果在相关技术中的底面的侧边设置两个侧壁，该两个侧壁100所形成的定位空隙101包括上述第一方向定位空隙1011和第二方向定位空隙1012，需要将两个侧壁设在底面的相邻两个侧边(两个侧边的延伸方向不停)上，使得该两个侧壁所形成的定位空隙101包括第一方向定位空隙1011和第二方向定位空隙1012。
示例性的，图1和图2给出了定位空隙101的一种形成结构。该定位空隙102位于上述底面10a的角部。该底面10a的角部是指上述底面10a中相邻两个侧边的交汇部。该定位空隙101所包括的第一方向定位空隙1011在底面10a所在平面的正投影和第二方向定位空隙1012在底面10a所在平面的正投影所形成的定位夹角为90°。
在一些实施例中，从图1和图2可以看出，由于每个定位空隙101所包括的第一方向定位空隙1011和第二方向定位空隙1012的开设方向不同，使得至少一个导光定位部110中每个导光定位部为凸起式导光定位部，至少一个膜片定位部120中每个膜片定位部120为凸起式膜片定位部时，共用定位空隙101的凸起式导光定位部的凸起方向和凸起式膜片定位部的凸起方向不同。
在一些实施例中，对于侧入式的导光板11来说，导光板11的入光面位于导光板11的侧面，并与导光板11的板面所在平面垂直。凸起式导光定位部的凸起方向与导光板主体部111的板面所在平面平行。换句话说，凸起式导光定位部的凸起方向为一具有方向的矢量， 其平行于导光板主体部111的板面所在平面。每个膜片定位部120为凸起式膜片定位部。凸起式膜片定位部的凸起方向与导光板主体部111的板面平行。换句话说，凸起式膜片定位部的凸起方向为一具有方向的矢量，其平行于导光板主体部111的板面所在平面。
在一种实现方式中，与上述凸起式膜片定位部共用上述定位空隙101的凸起式导光定位部110的凸起方向垂直于导光板11的入射面。与上述凸起式导光定位部共用上述定位空隙101的凸起式膜片定位部的凸起方向平行于导光板11的入射面，可使得上述凸起式导光定位部和上述凸起式膜片定位部所共用的定位空隙101所包括的第一方向定位空隙1011在底面所在10a平面的正投影和上述第二方向定位空隙1012在底面10a所在平面的正投影形成的定位夹角为90°。
在另一种实现方式中，与上述凸起式膜片定位部120共用上述定位空隙101的凸起式导光部的凸起方向平行于上述导光板11的入射面，与上述凸起式导光定位部共用上述定位空隙101的凸起式膜片定位部的凸起方向垂直于导光板11的入射面，这可使得上述凸起式导光定位部和上述凸起式膜片定位部所共用的定位空隙101所包括的第一方向定位空隙1011在底面10a所在平面的正投影和第二方向定位空隙1012在底面10a所在平面的正投影形成的定位夹角为90°。
示例性地，如图4所示，上述凸起式导光定位部的数量为多个，上述凸起式膜片定位部的数量为多个。当凸起式导光定位部的数量为多个，上述凸起式膜片定位部的数量为多个时，多个凸起式导光定位部中至少两个凸起式导光定位部的凸起方向不同，多个凸起式膜片定位部中至少两个凸起式膜片定位部的凸起方向不同。
下面以多个凸起式导光定位部包括两个凸起方向不同的凸起式导光定位部为例说明至少两个凸起式导光定位部的凸起方向不同所带来的效果。相应的，多个凸起式膜片定位部中应当有两个凸起方向不同的凸起式膜片定位部。这两个凸起方向不同的凸起式膜片定位部与所述凸起方向不同的两个凸起式导光定位部一一对应。
当两个凸起式导光定位部的凸起方向不同时，如果导光板发生移 动，那么导光板11不仅朝着第一个凸起式导光定位部的凸起方向移动，而且还具有朝着第二个凸起式导光定位部的凸起方向移动的趋势，以使导光板朝着第一个凸起式导光定位部的凸起方向移动的力和导光板朝着第二个凸起式导光定位部的凸起方向移动的力的相互抵消，从而降低导光板11的移动机率。
同理，当两个凸起式膜片定位部的凸起方向不同，也可降低光学膜片12的移动机率。
示例性地，可采用以下三种结构降低导光板11的移动机率和光学膜片12的移动机率，但不仅限于以下三种结构。
第一种结构：沿着导光板主体部111侧面的周向方向，多个凸起式导光定位部中各个凸起式导光定位部的凸起方向顺时针变化；沿着光学膜片主体部121侧面的周向方向，多个凸起式膜片定位部中各个凸起式膜片定位部的凸起方向顺时针变化。
第二种结构：沿着导光板主体部111侧面的周向方向，多个凸起式导光定位部中各个凸起式导光定位部的凸起方向逆时针变化；沿着光学膜片主体部121侧面的周向方向，多个凸起式膜片定位部中各个凸起式膜片定位部的凸起方向逆时针变化。
第三种结构：沿着导光板主体部111侧面的周向方向，多个凸起式导光定位部中各个凸起式导光定位部的凸起方向交替变化；沿着光学膜片主体部121侧面的周向方向，多个凸起式膜片定位部中各个凸起式膜片定位部的凸起方向交替变化。
采用上述第一种结构和第二种结构降低导光板11的移动机率和光学膜片12的移动机率时，可使得上述导光板11和上述光学膜片12具有向更多方向移动的趋势。当导光板11和光学膜片12具有向更多方向移动的趋势时，导光板11和光学膜片12所受到的作用力的方向比较多，使得导光板11和光学膜片12的各个方向力可充分的相互抵消，从而进一步降低导光板11和光学膜片12的移动机率。
示例性的，图8给出了一种导光板11，该导光板11包括导光板主体部111和四个凸起式导光定位部，四个凸起式导光定位部分别为 第一凸起式导光定位部110a(左上角)、第二凸起式导光定位部11b(右上角)、第三凸起式导光定位部110c(右下角)和第四凸起式导光定位部110d(左下角)。从图8可以看出，第一凸起式导光定位部110a的凸起方向朝向图8的上侧方向，第二凸起式导光定位部110b的凸起方向朝向图8所示的左侧方向，第三凸起式导光定位部110c的凸起方向朝向图8所示的左侧方向，第四凸起式导光定位部110d的凸起方向朝向图8所示的右侧方向。
图3-图6给出了图8所示出的导光板11与背板10之间的配合关系。该背板10包括矩形结构的底面10a以及四个侧壁100。四个侧壁100分别是第一侧壁100a、第二侧壁100b、第三侧壁100c和第四侧壁100d。第一侧壁100a位于图3和图6所示的底面10a的左侧边，第二侧壁100b位于图3和图4所示的底面10a的上侧边，第三侧壁100c位于如图4和图5所示的侧壁的右侧边，第四侧壁100d位于图6和图7所示的底面10a的下侧边。
第一凸起式导光定位部110a朝着图3上部方向卡合在第一侧壁100a和第二侧壁100b所形成的第一定位空隙。第二凸起式导光定位部110b朝着图4右侧方向卡合在第二侧壁100b和第三侧壁100c所形成的第二定位空隙。第三凸起式导光定位部110c朝着图5右侧方向卡合在第三侧壁100c和第四侧壁100d所形成的第三定位空隙。第四凸起式导光定位部110d朝向图6左侧方向卡合在第四侧壁100d和第一侧壁100a所形成的第四定位空隙。
图10给出了一种光学膜片12。该光学膜片包括光学膜片主体部121和四个膜片定位部120(见图7)。四个膜片定位部120分别为第一凸起式膜片定位部120a、第二凸起式膜片定位部120b、第三凸起式膜片定位部120c和第四凸起式膜片定位部120d。从图9可以看出，第一凸起式膜片定位部120a的凸起方向朝向图9的左侧方向。第二凸起式膜片定位部120b的凸起方向朝向图9所示的上侧方向。第三凸起式膜片定位部120c的凸起方向朝向图9所示的下侧方向。第四凸起式膜片定位部120d的凸起方向朝向图9所示的下侧方向。
图7只给出一个膜片凸起部120与定位空隙101的配合关系。但是，如图1-图7所示，根据前文共用同一定位空隙101的凸起式膜片定位部和凸起式导光定位部在底面10a所在平面的正投影所形成的定位夹角的分析可知，当上述底面10a的形状为矩形，多个侧壁100中形成定位空隙101的相邻两个侧壁位于底面10a中相邻两个侧边时，如果上述定位夹角为90°，那么凸起式膜片定位部的凸出方向与凸起式导光定位部的凸出方向垂直。由于凸起式膜片定位部的凸出方向与凸起式导光定位部的凸出方向垂直，因此，当光学膜片12、导光板11、背板10配合在一起时，第一凸起式膜片定位部120a的朝着图3左侧方向卡合在第一侧壁100a和第二侧壁100b所形成的第一定位空隙，第二凸起式膜片定位部120b朝着图4上侧方向卡合在第二侧壁100b和第三侧壁100c所形成的第二定位空隙，第三凸起式膜片定位部120c朝着图5下侧方向卡合在第三侧壁100c和第四侧壁100d所形成的第三定位空隙，第四凸起式膜片定位部120d朝向图6下侧方向卡合在第四侧壁100d和第一侧壁100a所形成的第四定位空隙。
在一些实施例中，如图12-图15所示，为了避免多个侧壁100对导光板11和光学膜片12侧边的磨损，上述导光板主体部111的侧面与多个侧壁100中每个侧壁之间均具有第一缓冲空间1321。光学膜片主体部121的侧面与多个侧壁100中每个侧壁之间均具有第二缓冲空间1322。该第一缓冲空间1321、该第二缓冲空间1322以及多个侧壁100中每个侧壁一一对应。该多个侧壁100中每个侧壁所对应的第一缓冲空间1321和应第二缓冲空间1322连通并构成缓冲容纳区1320。该缓冲容纳区1320中设有内缓冲片132。
由于导光板主体部111的侧面与多个侧壁100中每个侧壁之间均具有第一缓冲空间1321，光学膜片主体部121的侧面与多个侧壁100中每个侧壁之间均具有第二缓冲空间1322，对应同一侧壁的第一缓冲空间1321和第二缓冲空间1322连通以构成缓冲容纳区1320，使得内缓冲片132设在该缓冲容纳区1320内，因此，当导光板11和光学膜片12发生移动时，可通过内缓冲片132防止导光板11和光学膜片12 直接撞到上述多个侧壁100中至少一个侧壁，从而使得内缓冲片132缓冲导光板11和光学膜片12撞击到上述多个侧壁100中至少一个侧壁的力度，从而减少多个侧壁100中相邻两个侧壁所形成的定位空隙101对导光板11和光学膜片12的定位功能的影响。
另外，由于内缓冲片132可缓冲导光板11和光学膜片12撞击到上述多个侧壁100中至少一个侧壁的力度使得多个侧壁100中至少一个侧壁对导光板11和光学膜片12的反作用力减弱，因此，在缓冲容纳区中设有内缓冲片132也可使得背光模组在使用过程中减少多个侧壁100中至少一个侧壁对导光板11和光学膜片12的磨损程度。
在一些实施例中，如图12和图15所示，上述背光模组1还包括胶框13。该胶框13包括胶框主体130和至少一个外缓冲片131。至少一个外缓冲片131与至少一个内缓冲片132一一对应。至少一个外缓冲片131和至少一个内缓冲片132设在所述胶框主体130的同一表面。该胶框主体130、至少一个外缓冲片131中每个外缓冲片和至少一个内缓冲片132中相应的内缓冲片形成具有嵌入口的侧壁嵌入空隙130a。多个侧壁100中至少一个侧壁一一对应的通过嵌入口伸入至少一个侧壁嵌入空隙130a中。
上述胶框主体130位于上述光学膜片12背离上述导光板11的出光面所在方向(图12未示出导光板11和光学膜片12)。该胶框主体130所在位置为遮光区域BM，胶框主体130为环状结构的胶框主体。环状结构的胶框主体所围成的区域为透光区域，以供导光板11和光学膜片12所导出的光线通过。
由于上述胶框主体130、至少一个外缓冲片131中每个和至少一个内缓冲片132中相应的内缓冲片形成具有嵌入口的侧壁嵌入空隙130a。多个侧壁中至少一个侧壁100一一对应的通过嵌入口伸入侧壁嵌入空隙130a中，使得侧壁嵌入空隙130a可对嵌入侧壁嵌入空隙130a的侧壁100进行保护。
在一些实施例中，如图12-图16所示，由于内缓冲片132和外缓冲片131均有一定的缓冲功能，而制作胶框13所用的材料一般具有 缓冲功能，因此，可采用同样的缓冲材料通过一体成型工艺一次性完成至少一个外缓冲片131、至少一个内缓冲片132和胶框主体130的制作，以简化背光模组1的制作工艺。
如图14-图16所示，本公开一些实施例还提供了一种显示装置3。该显示装置包括上述背光模组1。
与相关技术相比，本公开实施例提供的显示装置的有益效果与上述背光模组的有益效果相同，在此不做赘述。
在一些实施例中，上述显示装置可以为手机、平板电脑、电视机、显示器、笔记本电脑、数码相框或导航仪等任何具有显示功能的产品或部件。
在一些实施例中，如图15所示，上述显示装置3一般还包括显示面板2。为了防止漏光，上述背光模组中胶框13还包括保护套133。该保护套133设在胶框主体130没有形成内缓冲片132的表面，使得显示面板2位于保护套133内。由于显示面板2位于保护套133内，因此，保护套133不仅可以保护显示面板2，而且还可以封装背光模组和显示面板2的连接部，从而防止背光模组向显示面板2所提供的光线在该连接部漏光。
在一些实施例中，如图16所示，上述保护套133一般采用缓冲材料制成，而胶框主体130、内缓冲片132和外缓冲片131也可采用缓冲材料制成，因此，可采用一体成型工艺完成保护套133、胶框主体130、内缓冲片132，外缓冲片131的制作。
需要说明的是，如图16所示，上述显示面板2的遮光区域BM与背光模组的边框区域至少与背光模组中胶框主体130的位置对应。换句话说，上述显示面板2的边框区域与背光模组的遮光区域BM位置对应。此时，上述显示面板2的边框区域在导光板11的正投影与导光板11的边缘有部分重叠，以保证导光板11中凸起式导光定位部所凸出部位的导光板网点位于遮光区。
在上述实施方式的描述中，具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开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，包括背板和导光板，其中，
    所述导光板和所述背板层叠的设在一起；
    所述背板包括底面，以及位于所述底面的侧边的多个侧壁，所述多个侧壁中相邻两个侧壁之间形成定位空隙；所述导光板包括导光板主体部以及至少一个设在所述导光板主体部的侧面的导光定位部，所述导光定位部与所述定位空隙卡合。
  2. 根据权利要求1所述的背光模组，还包括光学膜片，其中，所述光学膜片位于所述导光板的出光面；所述光学膜片包括光学膜片主体部以及至少一个设在所述光学膜片主体部的膜片定位部；所述膜片定位部与所述定位空隙卡合。
  3. 根据权利要求2所述的背光模组，其中，所述膜片定位部在所述底面所在平面的正投影与所述膜片定位部所卡合的所述定位空隙在所述底面所在平面的正投影至少部分交叠，所述导光定位部在所述底面所在平面的正投影与所述导光定位部所卡合的所述定位空隙在所述底面所在平面的正投影至少部分交叠。
  4. 根据权利要求3所述的背光模组，其中，所述定位空隙的厚度与形成所述定位空隙的相邻两个侧壁的壁厚相同，所述定位空隙的厚度方向与形成所述定位空隙的相邻两个侧壁的壁厚方向相同；
    所述导光定位部在所述底面所在平面的正投影的外边缘线位于所述导光定位部所卡合的定位空隙在所述底面所在平面的正投影内；
    所述膜片定位部在所述底面所在平面的正投影的外边缘线位于所述膜片定位部所卡合的定位空隙在所述底面所在平面的正投影内。
  5. 根据权利要求2所述的背光模组，其中，至少一个导光定位部一一对应的与至少一个定位空隙卡合，至少一个膜片定位部一一对应的与至少一个定位空隙卡合。
  6. 根据权利要求2所述的背光模组，其中，所述多个侧壁中每个侧壁所在平面与所述底面所在平面垂直，所述导光定位部和所述导光板主体部位于同一平面，所述光学膜片主体部和所述膜片定位部位于同一平面。
  7. 根据权利要求2所述的背光模组，其中，每个所述定位空隙包括相互连 通的第一方向定位空隙和第二方向定位空隙，每个所述定位空隙包括的所述第一方向定位空隙在底面所在平面的正投影与所述第二方向定位空隙在底面所在平面的正投影具有定位夹角，所述定位夹角等于75°-135°；
    至少一个膜片定位部中的一个膜片定位部与至少一个导光定位部中的一个导光定位部共用一个定位空隙，所述至少一个导光定位部中一个导光定位部与所述至少一个导光定位部中一个导光定位部所卡合的所述定位空隙包括的第一方向定位空隙卡合，所述至少一个膜片定位部中一个膜片定位部与所述至少一个膜片定位部中一个膜片定位部所卡合的所述定位空隙包括的第二方向定位空隙卡合。
  8. 根据权利要求7所述的背光模组，其中，至少一个导光定位部和至少一个膜片定位部一一对应的共用至少一个定位空隙。
  9. 根据权利要求7所述的背光模组，其中，所述至少一个导光定位部中每个导光定位部为凸起式导光定位部，所述至少一个膜片定位部中每个膜片定位部为凸起式膜片定位部；
    共用所述定位空隙的所述凸起式导光定位部的凸起方向和所述凸起式膜片定位部的凸起方向不同。
  10. 根据权利要求7所述的背光模组，其中，所述至少一个导光定位部为凸起式导光定位部，所述至少一个导光定位部的凸起方向与所述导光板主体部的板面平行；所述至少一个膜片定位部为凸起式膜片定位部，所述至少一个膜片定位部的凸起方向与所述导光板主体部的板面平行；与所述凸起式膜片定位部共用所述定位空隙的所述凸起式导光定位部的凸起方向垂直于所述导光板的入射面，与所述凸起式导光定位部共用所述定位空隙的所述凸起式膜片定位部的凸起方向平行于所述导光板的入射面；或
    与所述凸起式膜片定位部共用所述定位空隙的所述凸起式导光部的凸起方向平行于所述导光板的入射面，与所述凸起式导光部共用所述定位空隙的所述凸起式膜片定位部的凸起方向垂直于所述导光板的入射面。
  11. 根据权利要求9所述的背光模组，其中，所述凸起式导光定位部的数量为多个，所述凸起式膜片定位部的数量为多个；
    多个凸起式导光定位部中至少两个凸起式导光定位部的凸起方向不同，多 个凸起式膜片定位部中至少两个凸起式膜片定位部的凸起方向不同。
  12. 根据权利要求11所述的背光模组，其中，沿着所述导光板主体部侧面的周向方向，多个凸起式导光定位部中各个所述凸起式导光定位部的凸起方向顺时针变化、逆时针变化或交替变化；沿着所述光学膜片主体部侧面的周向方向，多个凸起式膜片定位部中各个所述凸起式膜片定位部的凸起方向顺时针变化、逆时针变化或交替变化。
  13. 根据权利要求2所述的背光模组，还包括胶框，其中，所述导光板主体部的侧面与所述多个侧壁中的每个侧壁之间均具有第一缓冲空间，所述光学膜片主体部的侧面与所述多个侧壁中的每个侧壁之间均具有第二缓冲空间，所述第一缓冲空间、所述第二缓冲空间以及所述多个侧壁中每个侧壁一一对应，所述多个侧壁中每个侧壁所对应的第一缓冲空间和第二缓冲空间连通并构成缓冲容纳区，所述缓冲容纳区中设有内缓冲片；
    所述胶框包括胶框主体和至少一个外缓冲片，所述至少一个外缓冲片与至少一个内缓冲片一一对应；所述至少一个外缓冲片和所述至少一个内缓冲片设在所述胶框主体的同一表面；所述胶框主体、所述至少一个外缓冲片中每个外缓冲片和所述至少一个内缓冲片中相应的内缓冲片形成具有嵌入口的侧壁嵌入空隙，所述多个侧壁中至少一个侧壁一一对应的通过所述嵌入口伸入至少一个侧壁嵌入空隙中。
  14. 根据权利要求2所述的背光模组，其中，所述光学膜片的层数为多层，多层光学膜片中每层光学膜片设有对位标记孔，所述多层光学膜片中各层光学膜片所设有的对位标记孔在底面所在平面的正投影相互独立。
  15. 根据权利要求1所述的背光模组，其中，所述导光板为侧入式导光板，所述背光模组包括遮光区域和透光区域，所述导光定位部上分布有位于所述透光区域和遮光区域的导光板网点。
  16. 一种显示装置，包括权利要求1所述背光模组。
  17. 根据权利要求16所述的显示装置，还包括显示面板，其中，所述背光模组中的胶框还包括保护套；所述保护套设在所述胶框主体没有形成所述内缓冲片的表面，所述显示面板位于所述保护套内。
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