WO2023202646A1 - 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
WO2023202646A1
WO2023202646A1 PCT/CN2023/089348 CN2023089348W WO2023202646A1 WO 2023202646 A1 WO2023202646 A1 WO 2023202646A1 CN 2023089348 W CN2023089348 W CN 2023089348W WO 2023202646 A1 WO2023202646 A1 WO 2023202646A1
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WO
WIPO (PCT)
Prior art keywords
light
optical film
transparent substrate
backlight module
emitting unit
Prior art date
Application number
PCT/CN2023/089348
Other languages
English (en)
French (fr)
Inventor
王贝贝
石海军
屈庆山
郭晖
Original Assignee
京东方科技集团股份有限公司
北京京东方显示技术有限公司
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Filing date
Publication date
Application filed by 京东方科技集团股份有限公司, 北京京东方显示技术有限公司 filed Critical 京东方科技集团股份有限公司
Publication of WO2023202646A1 publication Critical patent/WO2023202646A1/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
    • 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
    • G02F1/133308—Support structures for LCD panels, e.g. frames or bezels

Definitions

  • the present disclosure relates to the field of display technology, and in particular to a backlight module and a display device.
  • a backlight module is used to provide a light source for the liquid crystal display structure.
  • Optical film is an important component of backlight modules.
  • edge bright lines or optical film wrinkles For example, optical film materials are prone to deformation and wrinkles in hot air or high humidity environments. When the edges of the optical film materials wrinkle, the display effect of the liquid crystal display module will be poor; and when the edges of the optical film materials wrinkle, it will Part of the incident light does not pass through the optical film, so the brightness is high, causing the problem of edge bright lines at certain viewing angles.
  • the present disclosure discloses a backlight module and a display device, which are used to reduce light leakage at the edge of the display device.
  • the present disclosure provides a backlight module, including:
  • a light-emitting unit located on one side of the backplane, the surface of the light-emitting unit facing away from the backplane forming a light-emitting surface;
  • a frame is provided around the edge of the back plate.
  • the back plate and the frame form a receiving space.
  • the frame includes a support platform and a bearing platform connected to the support platform, wherein the bearing platform has a direction facing The side wall surface of the accommodation space, the support platform has a support surface connected to the side wall surface;
  • optical film material structure located in the accommodation space, the optical film material structure is located on one side of the light-emitting surface of the light-emitting unit, and the optical film material structure is supported by the support surface;
  • the optical film material structure includes a third A transparent substrate, an optical film layer and a second transparent substrate, wherein: the first transparent substrate is located on one side of the light emitting surface of the light-emitting unit, the first transparent substrate is disposed on the frame, and the first transparent substrate The substrate is used to diffuse the emitted light of the light-emitting unit;
  • the optical film layer is located on the side of the first transparent substrate facing away from the light-emitting unit;
  • the second transparent substrate is located on the side of the optical film layer facing away from the first On one side of the transparent substrate, the second transparent substrate is used to diffuse incident light and press the optical film layer;
  • the distance between the surface of the optical film structure facing the side wall and the side wall of the carrying platform is less than a preset distance.
  • a frame is provided on the edge of the backplane of the backlight module provided by the present disclosure.
  • the backplane and the frame form a receiving space.
  • the frame includes a support platform and a bearing platform connected to the support platform.
  • the bearing platform has a side wall surface, and the side wall surface Facing the accommodation space, the support platform has a support surface, and the support surface of the support platform is connected to the side wall surface of the bearing platform;
  • a light-emitting unit is set on one side of the backboard, and the light-emitting unit and the optical film material structure are both located in the accommodation space, and the optical film material structure
  • the optical film structure specifically includes a first transparent substrate, an optical film layer and a second transparent substrate from bottom to top, where The first transparent substrate is arranged on the frame on one side of the light-emitting surface of the light-emitting unit.
  • the first transparent substrate diffuses the light emitted from the light-emitting unit.
  • the light diffused by the first transparent substrate passes through the optical film layer and the second The transparent substrate performs diffusion. Since the expansion coefficients of the first transparent substrate and the second transparent substrate are both small, the optical film layer located on the second transparent substrate can be effectively compacted through the cooperation of the second transparent substrate and the first transparent substrate.
  • the optical film layer between the first transparent substrate and the first transparent substrate is wrinkled, thereby avoiding abnormal picture problems caused by the wrinkles of the optical film layer; the distance between the optical film material structure and the side wall surface of the carrying platform is less than the preset distance, that is, It is sufficient to leave a certain installation distance between the side surface of the optical film structure facing the side wall and the side wall. Since the distance between the optical film structure and the side wall of the bearing platform is reduced, the backlight module is further improved.
  • the edge bright lines can be significantly weakened, thereby improving the edge bright lines under a certain viewing angle range.
  • the preset distance ranges from 0.45mm to 0.55mm.
  • the first transparent substrate is in contact with the supporting surface.
  • a diffusion layer is formed on a side surface of the first transparent substrate facing away from the optical film layer.
  • the optical film layer includes a first diffusion sheet and a second diffusion sheet arranged in a stack.
  • the bearing platform has a bearing surface connected to the side wall surface, and the bearing surface is parallel to the support surface;
  • the carrying surface and the side surface of the second transparent substrate facing away from the optical film layer are located on the same plane.
  • the backlight module further includes an adhesive layer located on a side of the optical film structure facing away from the light-emitting unit; a part of the orthographic projection of the adhesive layer on the light-emitting unit is in contact with the second transparent The substrate contacts and the other part covers the load-bearing surface.
  • the backlight module further includes a side reflective layer; the side reflective layer is located on a side of the frame facing the accommodation space to reflect the light emitted from the light-emitting unit to the optical film material. structure.
  • the lighting unit includes multiple groups of mutually parallel light bars;
  • any of the plurality of groups of mutually parallel light bars includes a plurality of lamp beads arranged at intervals. Along the extending direction perpendicular to the light bars, the lamp beads in each group of light bars are arranged in one-to-one correspondence.
  • the thickness of the bearing platform ranges from 0.45mm to 0.55mm.
  • a backlight module including:
  • a light-emitting unit located on one side of the backplane, the surface of the light-emitting unit facing away from the backplane forming a light-emitting surface;
  • a frame is provided around the edge of the back plate.
  • the back plate and the frame form a receiving space.
  • the frame includes a support platform and a bearing platform connected to the support platform, wherein the bearing platform has a direction facing the The side wall surface of the accommodation space, the support platform has a support surface connected to the side wall surface;
  • a light guide strip is located on the support surface.
  • a light exit surface is formed on the side of the light guide bar away from the support surface.
  • the light guide bar has a first side and a second side connected to the light exit surface. first The side surface is arranged opposite to the second side surface, the emitted light of the light-emitting unit enters from the first side surface, and the second side surface of the light guide strip is in contact with the side wall surface;
  • the optical film structure located in the accommodation space.
  • the optical film structure includes a stacked diffusion film and an optical film layer.
  • the diffusion film is provided on one side of the light exit surface of the light guide strip.
  • the optical film also includes a diffuse reflection layer, which is disposed on the side wall of the bearing platform and located on the side of the light exit surface of the light guide strip.
  • a frame is provided at the edge of the back plate, and the back plate and the frame form an accommodation space.
  • the frame includes a support platform and a bearing platform connected to the support platform.
  • the bearing platform has a side wall surface, and the side wall surface faces the accommodation space.
  • the support platform has Support surface, the support surface of the support platform is connected to the side wall surface of the bearing platform; a light-emitting unit is set on one side of the back plate, and the light-emitting unit is located in the accommodation space.
  • a light guide strip is set on the support surface, and the light guide strip is away from the support surface.
  • a light exit surface is formed on one side of the light guide bar.
  • the light guide bar has a first side and a second side connected to the light exit surface.
  • the emitted light of the light emitting unit enters from the first side of the light guide bar.
  • the second side of the light guide bar is connected to the side wall surface.
  • an optical film structure located in the accommodation space.
  • the optical film structure includes a stacked diffusion film and an optical film layer.
  • the diffusion film is provided on one side of the light exit surface of the light guide strip.
  • the optical film structure also includes a diffuse reflection layer. , and then the diffuse reflection layer is arranged on the side wall of the bearing platform and is located on the light exit surface side of the light guide strip.
  • the thickness of the diffuse reflection layer can block the emitted light from the gap between the light guide strip and the side wall surface, thereby further making the backlight module
  • the edge bright lines of the group can be significantly weakened, thereby improving the edge bright lines under a certain viewing angle range.
  • the projection of the optical film layer and the diffusion film on the side wall surface of the bearing platform is completely located within the diffuse reflection layer.
  • the optical film layer includes a first diffusion sheet and a second diffusion sheet arranged in a stack.
  • the backlight module further includes an adhesive layer covering the bearing surface.
  • the backlight module further includes a side reflective layer; the side reflective layer is located on a side of the frame facing the accommodation space to reflect the light emitted from the light-emitting unit to the optical film material. structure.
  • the lighting unit includes multiple groups of mutually parallel light bars;
  • any of the plurality of groups of mutually parallel light bars includes a plurality of lamp beads arranged at intervals. Perpendicular to the extension direction of the light bars, the lamp beads in each group of light bars are arranged in one-to-one correspondence.
  • the thickness of the bearing platform ranges from 0.45mm to 0.55mm.
  • the present disclosure provides a display device, including: the backlight module according to any one of the first aspect or any one of the second aspect;
  • a panel is located on one side of the light-emitting surface of the backlight module.
  • the panel includes a display area and a non-display area located around the display area.
  • the orthographic projection of the carrying surface of the frame in the backlight module on the panel is located in the non-display area.
  • Figure 1 is a partial structural schematic diagram of a backlight module provided by an embodiment of the present disclosure
  • Figure 2 is a schematic structural diagram of a display device provided by an embodiment of the present disclosure
  • Figure 3 is a partial enlarged schematic diagram of position A in Figure 2;
  • Figure 4 is an optical path diagram of the display device in Figure 2;
  • Figure 5 is an enlarged schematic diagram of the optical film structure in Figure 1;
  • Figure 6 is a partial structural schematic diagram of another backlight module provided by an embodiment of the present disclosure.
  • Figure 7 is a schematic structural diagram of another display device provided by an embodiment of the present disclosure.
  • Figure 8 is an optical path diagram of the display device in Figure 7;
  • Figure 9 is an enlarged structural schematic diagram of an optical film layer provided by an embodiment of the present disclosure.
  • FIG. 10 is a schematic plan view of a light-emitting unit provided by an embodiment of the present disclosure.
  • the present disclosure provides a backlight module, including:
  • the light-emitting unit 2 is located on one side of the back plate 6, and the surface of the light-emitting unit 2 facing away from the back plate 6 forms a light-emitting surface;
  • a frame 1 is provided around the edge of the back plate 6.
  • the back plate 6 and the frame 1 form an accommodation space.
  • the frame 1 includes a support platform 11 and a bearing platform 12 connected to the support platform 11.
  • the bearing platform 12 has a side facing the accommodation space.
  • Wall surface 121, the support platform 11 has a support surface 111 connected to the side wall surface 121;
  • the optical film structure 3 is located in the accommodation space.
  • the optical film structure 3 is located on one side of the light-emitting surface of the light-emitting unit 2.
  • the optical film structure 3 is supported by the supporting surface 111;
  • the optical film structure 3 includes a first transparent substrate 31, an optical Film layer 32 and second transparent substrate 33, wherein: the first transparent substrate 31 is located on the light emitting surface side of the light-emitting unit 2, the first transparent substrate 31 is provided on the frame 1, and the first transparent substrate 31 is used to diffuse the light emitting unit 2 Emitting light;
  • the optical film layer 32 is located on the side of the first transparent substrate 31 facing away from the light-emitting unit 2;
  • the second transparent substrate 33 is located on the side of the optical film layer 32 facing away from the first transparent substrate 31, and the second transparent substrate 33 is used to diffuse the incident light And laminate the optical film layer 32;
  • the distance between the surface of the optical film structure 3 facing the side wall surface 121 and the side wall surface 121 of the carrying platform 12 is less than the preset distance.
  • a frame 1 is provided on the edge of the back panel 6 of the backlight module provided by the present disclosure.
  • the back panel 6 and the frame 1 form a receiving space.
  • the frame 1 includes a support platform 11 and a bearing platform 12 connected to the support platform 11, wherein
  • the bearing platform 12 has a side wall surface 121 , and the side wall surface 121 faces the accommodation space.
  • the support platform 11 has a support surface 111 , and the support surface 111 of the support platform 11 is connected to the side wall surface 121 of the bearing platform 12 ;
  • a light emitting device is provided on one side of the back plate 6 Unit 2, the light-emitting unit 2 and the optical film structure 3 are all located in the accommodation space.
  • the optical film structure 3 is on one side of the light exit surface of the light-emitting unit 2, and the optical film structure 3 is supported by the support surface 111 of the support platform 11.
  • the optical film structure 3 specifically includes a first transparent substrate from bottom to top. 31.
  • the first transparent substrate 31 provided on the frame 1 is on one side of the light exit surface of the light emitting unit 2.
  • the first transparent substrate 31 carries out the light emitted from the light emitting unit 2. Diffusion, the light diffused through the first transparent substrate 31 is diffused again through the optical film layer 32 and the second transparent substrate 33. Since the expansion coefficients of the first transparent substrate 31 and the second transparent substrate 33 are both small, the light passes through the second transparent substrate 31.
  • the distance between the optical film structure 3 and the side wall surface 121 of the carrying platform 12 is less than the preset distance, that is, the side surface of the optical film structure 3 facing the side wall surface 121 and the side wall surface It is sufficient to leave a certain installation distance between 121. Since the distance between the optical film structure 3 and the side wall surface 121 of the bearing platform 12 is reduced, the edge bright line of the backlight module can be significantly weakened, thereby improving a certain Bright line at the lower edge of the viewing angle range.
  • the back plate 6 is connected to the frame 1 through a connecting member 7.
  • the connecting member 7 may be a bolt.
  • the backplane 6 in the backlight module provided by the embodiment of the present disclosure is a base body, and a light-emitting unit 2 is installed on one side of the backplane 6.
  • a light-emitting unit 2 is installed on one side of the backplane 6.
  • a reflective sheet 22 is provided on one side of the back plate 6.
  • the reflective sheet 22 is used to improve the utilization of the light emitted by the light emitting unit 2.
  • a flexible printed circuit board 23 is also provided on the side of the reflective sheet 22 facing the back plate 6.
  • the flexible printed circuit board 23 is provided on one side of the back plate 6.
  • the printed circuit board 23 is electrically connected to the light-emitting unit 2 to control the operation of the light-emitting unit 2 .
  • the frame 1 is an aluminum frame
  • the optical film structure 3 includes a first transparent substrate 31 , an optical film layer 32 and a second transparent substrate 33 arranged in sequence from top to bottom, where the first transparent substrate 31 and the second transparent substrate 33 Both are glass plates.
  • a glass plate with a certain roughness such as frosted glass
  • the roughness of the two glass plates can be the same.
  • the two glass plates of the first transparent substrate 31 and the second transparent substrate 33 may both be frosted glass, or any one of the glass plates may be frosted glass.
  • the first transparent substrate 31, the optical film layer 32 and the second transparent substrate 33 are all placed on the supporting surface 111.
  • the first transparent substrate 31 is in contact with the supporting surface 111.
  • the support strength of 3 the support surface 111 and the first transparent element in the optical film structure 3
  • the mounting width of the substrate 31 is 1.5 mm.
  • the panel 5 is disposed on the optical film structure 3.
  • the bearing platform 12 has a bearing surface 122 connected to the side wall surface 121.
  • the bearing surface 122 is parallel to the supporting surface 111; the bearing surface 122 and the second transparent substrate 33
  • the side surface facing away from the optical film layer 32 is located on the same plane.
  • the backlight module also includes an adhesive layer 4 located on the side of the optical film structure 3 away from the light-emitting unit 2, and is fixed on the bearing surface 122 through the adhesive layer 4; part of the orthographic projection of the adhesive layer 4 on the light-emitting unit 2 is in contact with the second transparent
  • the base plate 33 is in contact with the other part covering the bearing surface 122 .
  • the adhesive layer 4 is glue, and the thickness of the adhesive layer 4 is 0.2 mm to 0.3 mm.
  • a part of the adhesive layer 4 is coated on the supporting surface 111 , and the other part of the adhesive layer 4 is coated on the base material in the optical film structure 3 .
  • the adhesive layer 4 can achieve a good bonding effect on the one hand.
  • each film layer in the optical film structure 3 will not move downwards and cause a large gap between the frame 1 and the frame 1; On the other hand, it can block the light from the light-emitting unit 2 from passing through the gap, thereby effectively improving the picture quality.
  • the positional relationship between the panel 5, the optical film structure 3 and the frame 1 is in which the thickness of the second transparent substrate 33 is 0.5mm and is flush with the bearing surface 122 of the frame 1 , and the adhesive layer 4 is applied to the side surface of the second transparent substrate 33 facing the panel 5;
  • the optical film layer 32 in the optical film material structure 3 includes a first diffusion sheet 321 and a second diffusion sheet 322.
  • the total thickness is 0.55mm; the thickness of the first transparent substrate 31 is 1.1mm.
  • a diffusion layer 34 is provided on the entire surface of the first transparent substrate 31 on the side facing away from the optical film layer 32.
  • the diffusion layer 34 is, for example, diffusion ink.
  • first transparent substrate 31 and the second transparent substrate 33 are made of glass, the expansion coefficients of the first transparent substrate 31 and the second transparent substrate 33 are small.
  • the first transparent substrate 31 and the second transparent substrate 33 in the optical film structure 3 are The end faces of the substrate 33 and the optical film layer 32 are designed to be flush, which can avoid abnormal picture problems caused by wrinkles of the optical film layer 32 in large-size backlight modules. Since the above solution does not require the light guide strip 8 and the diffuse reflection sheet 22, there will be no accumulation of light, and therefore no bright lines will be generated.
  • Only d needs to be reserved between the optical film structure 3 and the frame 1, and d is an assembly gap of 0.45mm-0.55mm.
  • the assembly gap can be 0.5mm, and the bright line effect on the edge of the backlight module can be significantly weakened, thereby Improve the edge bright line problem under certain viewing angles.
  • the thickness of the bearing platform 12 ranges from 0.45mm to 0.55mm, for example, 0.5mm, that is, the frame 1 is used for bearing
  • the bearing surface 122 of the surface 122 board is reduced to 0.5mm, which can further improve the problem of pixels blocked by the frame 1 and improve the quality of the surrounding screen.
  • the backlight module also includes a side reflective layer 9; the side reflective layer 9 is located on the side of the frame 1 facing the accommodation space to reflect the emitted light from the light-emitting unit 2 to the optical film structure 3, as shown in Figure 4
  • the dotted arrow represents the light path of the light emitting unit 2 .
  • a diffusion layer 34 is formed on a side surface of the first transparent substrate 31 away from the optical film layer 32 .
  • the diffusion layer 34 is diffusion ink, which diffuses the light emitted by the light-emitting unit 2 .
  • the optical film layer 32 includes a stacked first diffusion sheet 321 and a second diffusion sheet 322. The total thickness of the first diffusion sheet 321 and the second diffusion sheet 322 is 0.55 mm.
  • the light-emitting unit 2 includes multiple sets of mutually parallel light bars 21 ; any one of the multiple sets of mutually parallel light bars 21 It includes a plurality of lamp beads 211 arranged at intervals. Along the extending direction of the vertical light bar 21, the lamp beads 211 in each group of light bars 21 are arranged in one-to-one correspondence.
  • the light bar 21 includes eight groups of light bars 21 that are parallel to each other.
  • the light bars 21 are symmetrically distributed with the dotted line in Figure 10 as the center.
  • Each group of light bars 21 has 14 lamp beads 211 arranged at intervals.
  • the lamp beads 211 It is distributed symmetrically with the dotted line in Figure 10 as the center.
  • the distribution spacing of the light bar 21 is 54.5mm, 90mm, 74.6mm,..., 74.6mm, 90mm, 54.5mm respectively;
  • the distribution spacing of the lamp beads 211 is 62.5mm, 82mm, 75.5mm,..., 75.5mm, respectively. 82mm, 62.5mm.
  • the distribution spacing of the light bars 21 can be selected according to the actual situation, and the distribution gap of the lamp beads 211 can also be selected according to the actual situation.
  • a backlight module provided by the present disclosure includes:
  • the light-emitting unit 2 is located on one side of the back plate 6, and the surface of the light-emitting unit 2 facing away from the back plate 6 forms a light-emitting surface;
  • a frame 1 is provided around the edge of the back plate 6.
  • the back plate 6 and the frame 1 form an accommodation space.
  • the frame 1 includes a support platform 11 and a bearing platform 12 connected to the support platform 11.
  • the bearing platform 12 has a side facing the accommodation space.
  • Wall surface 121, the support platform 11 has a support surface 111 connected to the side wall surface 121;
  • the light guide strip 8 is located on the support surface 111.
  • a light outlet is formed on the side of the light guide strip 8 away from the support surface 111. surface, the light guide strip 8 has a first side and a second side connected to the light exit surface. The first side and the second side are arranged oppositely.
  • the emitted light of the light emitting unit 2 enters from the first side, and the second side of the light guide strip 8 Contact and connected with the side wall surface 121;
  • the optical film structure 3 is located in the accommodation space.
  • the optical film structure 3 includes a stacked diffusion film 35 and an optical film layer 32.
  • the diffusion film 35 is provided on one side of the light exit surface of the light guide strip 8.
  • the optical film structure 3 also It includes a diffuse reflection layer 36 , which is disposed on the side wall surface 121 of the bearing platform 12 and located on the light exit surface side of the light guide strip 8 .
  • a frame 1 is provided at the edge of the back plate 6 .
  • the back plate 6 and the frame 1 form a receiving space.
  • the frame 1 includes a support platform 11 and a bearing platform 12 connected to the support platform 11 .
  • the bearing platform 12 has a side wall surface 121 , the side wall surface 121 faces the accommodation space, the support platform 11 has a support surface 111, and the support surface 111 of the support platform 11 is connected to the side wall surface 121 of the bearing platform 12;
  • a light-emitting unit 2 is provided on one side of the back plate 6, and the light-emitting unit 2 is located In the accommodation space, first, a light guide strip 8 is set on the support surface 111. A light exit surface is formed on the side of the light guide bar 8 away from the support surface 111.
  • the light guide bar 8 has a first side and a second side connected to the light exit surface.
  • the emitted light of the light-emitting unit 2 enters from the first side of the light guide strip 8.
  • the second side of the light guide strip 8 is in contact with the side wall surface 121.
  • the optical film material structure 3 is located in the accommodation space.
  • the optical film material structure 3 includes a stacked arrangement.
  • the diffusion film 35 and the optical film layer 32 are arranged on one side of the light exit surface of the light guide strip 8.
  • the optical film structure 3 also includes a diffuse reflection layer 36, and then the diffuse reflection layer 36 is provided on the side of the carrying platform 12.
  • the thickness of the diffuse reflection layer 36 can block the light emitted from the gap between the light guide bar 8 and the side wall surface 121, thereby further allowing the edge bright lines of the backlight module to Significantly weakened, thus improving edge bright lines under a certain viewing angle range.
  • the frame 1 is an aluminum frame
  • the thickness of the optical film layer 32 is 0.55mm
  • the thickness of the diffusion film 35 is 1.5mm.
  • the thickness of the light guide strip 8 is 1.4mm
  • the gap between the diffusion film 35 and the frame 1 is 0mm
  • the thickness of the diffuse reflection layer 36 is 0.13mm
  • the width h 2.55mm.
  • the light guide strip 8 is attached first and then the diffuse reflection layer 36, as shown in Figure 8.
  • the dotted arrow in Figure 8 represents the light emitted from the light exit surface of the light guide strip 8. Therefore, the thickness of the diffuse reflection layer 36 can block the light guide strip 8.
  • the light emitted from the gap between the light bar 8 and the frame 1 can improve the visibility of bright lines under a specific viewing angle.
  • the projection of the optical film layer 32 and the diffusion film 35 on the side wall surface 121 of the carrying platform 12 is completely located in the diffuse reflection layer 36 , so that the light emitted from the light exit surface of the light guide strip 8 passes through the optical film material as much as possible.
  • structure 3 part of the light emitted from the light exit surface of the light guide strip 8 is diffused to the panel 5 through the diffusion film 35 and the optical film layer 32, and the other part of the light emitted from the light exit surface of the light guide strip 8 is reflected to the panel 5 through the diffuse reflection layer 36.
  • the optical film layer 32 includes a stacked first diffusion sheet 321 and a second diffusion sheet 322 .
  • the first diffusion sheet 321 and the second diffusion sheet 322 have a total thickness of 0.55 mm.
  • the backlight module also includes an adhesive layer 4 covering the bearing surface 122 .
  • the panel 5 is fixed on the bearing surface 122 through the adhesive layer 4; the orthographic projection of the adhesive layer 4 on the light-emitting unit 2 completely covers the bearing surface 122.
  • the adhesive layer 4 is glue, and the thickness of the adhesive layer 4 is 0.2 mm to 0.3 mm.
  • the backlight module further includes a side reflective layer 9; the side reflective layer 9 is located on the side of the frame 1 facing the accommodation space to reflect the light emitted from the light-emitting unit 2 to the optical film structure 3.
  • the light-emitting unit 2 includes multiple groups of mutually parallel light bars 21;
  • Any light bar 21 among multiple groups of mutually parallel light bars 21 includes a plurality of spaced-apart lamp beads 211 .
  • the lamp beads 211 in each group of light bars 21 are arranged in one-to-one correspondence, so that The light of the backlight module provided by the embodiments of the present disclosure is more uniform.
  • the light bar 21 includes eight groups of light bars 21 that are parallel to each other.
  • the light bars 21 are symmetrically distributed with the dotted line in Figure 10 as the center.
  • Each group of light bars 21 has 14 lamp beads 211 arranged at intervals.
  • the lamp beads 211 It is distributed symmetrically with the dotted line in Figure 10 as the center.
  • the distribution spacing of the light bar 21 is 54.5mm, 90mm, 74.6mm,..., 74.6mm, 90mm, 54.5mm respectively;
  • the distribution spacing of the lamp beads 211 is 62.5mm, 82mm, 75.5mm,..., 75.5mm, respectively. 82mm, 62.5mm.
  • the distribution spacing of the light bars 21 can be selected according to the actual situation, and the distribution gap of the lamp beads 211 can also be selected according to the actual situation.
  • the thickness of the bearing platform 12 ranges from 0.45mm to 0.55mm, for example, 0.5mm, that is, the bearing surface 122 of the frame 1 for the bearing surface 122 board should be 0.5mm, which can further improve the problem of the frame 1 blocking pixels and improve Picture peripheral quality.
  • the present disclosure provides a display device, including: any one of the first aspect or the second aspect Backlight module for any of the above items;
  • the panel 5 is located on one side of the light output surface of the backlight module.
  • the panel 5 includes a display area 51 and a non-display area 52 located around the display area 51 .
  • the orthographic projection of the carrying surface 122 of the frame 1 in the backlight module on the panel 5 is located in the non-display area 52 .
  • the frame 1 can be further improved. Solve the problem of blocked pixels and improve the quality of the surrounding areas of the picture.

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Abstract

一种背光模组及显示装置，背光模组包括背板（6）；位于背板（6）一侧的发光单元（2），背板（6）与框体（1）形成容纳空间，支撑台（11）具有与侧壁面（121）连接的支撑面（111）；位于容纳空间的光学膜材结构（3），光学膜材结构（3）位于发光单元（2）的出光面的一侧，光学膜材结构（3）通过支撑面（111）支撑；其中第一透明基板（31）位于发光单元（2）出光面一侧，第一透明基板（31）设置在框体（1）上，第一透明基板（31）用于扩散发光单元（2）的出射光线；光学膜层（32）位于第一透明基板（31）背离发光单元（2）的一侧；第二透明基板（33）位于光学膜层（32）背离第一透明基板（31）一侧，第二透明基板（33）用于扩散入射光线并压合光学膜层（32）；光学膜材结构（3）朝向侧壁面（121）的表面与承载台（12）侧壁面（121）之间的距离小于预设距离。

Description

背光模组及显示装置
相关申请的交叉引用
本公开要求在2022年04月22日提交中国专利局、申请号为202210432163.1、申请名称为“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公开中。
技术领域
本公开涉及显示技术领域，特别涉及一种背光模组及显示装置。
背景技术
在液晶显示装置中，背光模组用于为液晶显示结构提供光源。光学膜材是背光模组的重要组成材料，现有的背光模组中仍存在较多画面质量问题，其中不乏边缘亮线或光学膜材褶皱现象。例如光学膜材，容易在热空气或湿度大的环境下变形褶皱，当光学膜材边缘发生褶皱时，导致液晶显示模组的显示效果较差；并且当光学膜材边缘发生褶皱时，将会有部分入射光未经光学膜材因此亮度较高，使得在特定视角下表现为边缘亮线的问题。
发明内容
本公开公开了一种背光模组及显示装置，用于减少显示装置边缘漏光。
为达到上述目的，本公开提供以下技术方案：
第一方面，本公开提供一种背光模组，包括：
背板；
位于所述背板一侧的发光单元，所述发光单元背离所述背板的表面形成出光面；
围绕所述背板边缘设置的框体，所述背板与所述框体形成容纳空间，所述框体包括支撑台和与所述支撑台连接的承载台，其中所述承载台具有朝向 所述容纳空间的侧壁面，所述支撑台具有与所述侧壁面连接的支撑面；
位于所述容纳空间的光学膜材结构，所述光学膜材结构位于所述发光单元的出光面的一侧，所述光学膜材结构通过所述支撑面支撑；所述光学膜材结构包括第一透明基板、光学膜层和第二透明基板，其中：所述第一透明基板位于所述发光单元出光面一侧，所述第一透明基板设置在所述框体上，所述第一透明基板用于扩散所述发光单元的出射光线；所述光学膜层位于所述第一透明基板背离所述发光单元的一侧；所述第二透明基板位于所述光学膜层背离所述第一透明基板一侧，所述第二透明基板用于扩散入射光线并压合所述光学膜层；
所述光学膜材结构朝向所述侧壁面的表面与所述承载台侧壁面之间的距离小于预设距离。
本公开提供的背光模组的背板的边缘设置有框体，背板和框体形成有容纳空间，框体包括支撑台和与支撑台连接的承载台，其中承载台具有侧壁面，侧壁面朝向容纳空间，支撑台具有支撑面，支撑台的支撑面与承载台的侧壁面连接；在背板的一侧上设置发光单元，发光单元和光学膜材结构均位于容纳空间，光学膜材结构在发光单元的出光面的一侧，并且光学膜材结构通过支撑台的支撑面支撑，关于光学膜材结构具体包括由下到上的第一透明基板、光学膜层和第二透明基板，其中设置在框体上的第一透明基板在发光单元的出光面的一侧，第一透明基板将发光单元的出射光线进行扩散，经过第一透明基板扩散后的光线再次经过光学膜层和第二透明基板进行扩散，由于第一透明基板和第二透明基板的膨胀系数均较小，通过第二透明基板和第一透明基板的配合将光学膜层压紧，可以有效减小位于第二透明基板和第一透明基板之间的光学膜层发生褶皱，从而避免光学膜层发生褶皱而导致的画面异常问题；在光学膜材结构和承载台的侧壁面之间的距离小于预设距离，也就是光学膜材结构朝向侧壁面的一侧表面与侧壁面之间留有一定的安装距离即可，由于光学膜材结构和承载台的侧壁面之间的距离减小，从而进一步使得背光模组的边缘亮线可以明显减弱，从而改善一定视角范围下边缘亮线。
可选地，所述预设距离的范围为0.45mm-0.55mm。
可选地，所述第一透明基板与所述支撑面接触。
可选地，所述第一透明基板背离所述光学膜层的一侧表面形成有扩散层。
可选地，所述光学膜层包括层叠设置的第一扩散片和第二扩散片。
可选地，所述承载台具有与所述侧壁面连接的承载面，所述承载面与所述支撑面平行；
所述承载面与所述第二透明基板背离所述光学膜层的一侧表面位于同一平面。
可选地，所述背光模组还包括位于所述光学膜材结构背离所述发光单元一侧的粘贴层；所述粘贴层在所述发光单元上的正投影，一部分与所述第二透明基板接触，另一部分覆盖所述承载面。
可选地，所述背光模组还包括侧反射层；所述侧反射层位于所述框体朝向所述容纳空间的一侧，以使所述发光单元的出射光线反射至所述光学膜材结构。
可选地，所述发光单元包括多组相互平行的灯条；
所述多组相互平行的灯条中的任意灯条中包括多个间隔设置的灯珠，沿垂直所述灯条的延伸方向，每组灯条中的灯珠一一对应设置。
可选地，所述承载台的厚度范围为0.45mm-0.55mm。
第二方面，本公开提供的一种背光模组，包括：
背板；
位于所述背板一侧的发光单元，所述发光单元背离所述背板的表面形成出光面；
围绕所述背板边缘设置的框体，所述背板与所述框体形成容纳空间，所述框体包括支撑台和与所述支撑台连接的承载台，其中所述承载台具有朝向所述容纳空间的侧壁面，所述支撑台具有与所述侧壁面连接的支撑面；
位于所述支撑面的导光条，所述导光条远离所述支撑面的一侧形成有出光面，所述导光条具有与所述出光面连接的第一侧面和第二侧面，所述第一 侧面与所述第二侧面相对设置，所述发光单元的出射光线从所述第一侧面进入，所述导光条的第二侧面与所述侧壁面接触连接；
位于所述容纳空间的光学膜材结构，所述光学膜材结构包括层叠设置的扩散膜和光学膜层，所述扩散膜设置在所述导光条的出光面的一侧，所述光学膜材结构还包括漫反射层，所述漫反射层设置在所述承载台的侧壁面上，且位于所述导光条的出光面一侧。
在背板的边缘设置有框体，背板和框体形成有容纳空间，框体包括支撑台和与支撑台连接的承载台，其中承载台具有侧壁面，侧壁面朝向容纳空间，支撑台具有支撑面，支撑台的支撑面与承载台的侧壁面连接；在背板的一侧上设置发光单元，发光单元位于容纳空间，首先在支撑面上先设置导光条，导光条远离支撑面的一侧形成有出光面，导光条具有与出光面连接的第一侧面和第二侧面，发光单元的出射光线从导光条的第一侧面进入，导光条的第二侧面与侧壁面接触连接，位于容纳空间的光学膜材结构，光学膜材结构包括层叠设置的扩散膜和光学膜层，扩散膜设置在导光条的出光面的一侧，光学膜材结构还包括漫反射层，然后漫反射层设置在承载台的侧壁面上，且位于导光条的出光面一侧，这时漫反射层的厚度可遮挡导光条与侧壁面缝隙的出射光线，从而进一步使得背光模组的边缘亮线可以明显减弱，从而改善一定视角范围下边缘亮线。
可选地，所述光学膜层和所述扩散膜在所述承载台的侧壁面的投影完全位于所述漫反射层内。
可选地，所述光学膜层包括层叠设置的第一扩散片和第二扩散片。
可选地，所述背光模组还包括覆盖所述承载面的粘贴层。
可选地，所述背光模组还包括侧反射层；所述侧反射层位于所述框体朝向所述容纳空间的一侧，以使所述发光单元的出射光线反射至所述光学膜材结构。
可选地，所述发光单元包括多组相互平行的灯条；
所述多组相互平行的灯条中的任意灯条中包括多个间隔设置的灯珠，沿 垂直所述灯条的延伸方向，每组灯条中的灯珠一一对应设置。
可选地，所述承载台的厚度范围为0.45mm-0.55mm。
第三方面，本公开提供一种显示装置，包括：第一方面任一项或第二方面任一项所述的背光模组；
位于所述背光模组出光面一侧的面板，所述面板包括显示区以及位于所述显示区周边的非显示区。
可选地，所述的背光模组中的框体的承载面在所述面板上的正投影位于所述非显示区内。
附图说明
图1为本公开实施例提供的一种背光模组的局部结构示意图；
图2为本公开实施例提供的一种显示装置的结构示意图；
图3为图2中A处的局部放大示意图；
图4为在图2中的显示装置的光路图；
图5为图1中的光学膜材结构的放大示意图；
图6为本公开实施例提供的另一种背光模组的局部结构示意图；
图7为本公开实施例提供的另一种显示装置的结构示意图；
图8为图7中的显示装置的光路图；
图9为本公开实施例提供的光学膜层的放大结构示意图；
图10为本公开实施例提供的发光单元的平面结构示意图。
图中：1-框体；11-支撑台；111-支撑面；12-承载台；121-侧壁面；122-承载面；2-发光单元；21-灯条；211-灯珠；22-反射片；23-柔性印刷电路板；3-光学膜材结构；31-第一透明基板；32-光学膜层；321-第一扩散片；322-第二扩散片；33-第二透明基板；34-扩散层；35-扩散膜；36-漫反射层；4-粘贴层；5-面板；51-显示区；52-非显示区；6-背板；7-连接件；8-导光条；9-侧反射层。
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做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
如图1-图4所示，第一方面，本公开提供一种背光模组，包括：
背板6；
位于背板6一侧的发光单元2，发光单元2背离背板6的表面形成出光面；
围绕背板6边缘设置的框体1，背板6与框体1形成容纳空间，框体1包括支撑台11和与支撑台11连接的承载台12，其中承载台12具有朝向容纳空间的侧壁面121，支撑台11具有与侧壁面121连接的支撑面111；
位于容纳空间的光学膜材结构3，光学膜材结构3位于发光单元2的出光面的一侧，光学膜材结构3通过支撑面111支撑；光学膜材结构3包括第一透明基板31、光学膜层32和第二透明基板33，其中：第一透明基板31位于发光单元2出光面一侧，第一透明基板31设置在框体1上，第一透明基板31用于扩散发光单元2的出射光线；光学膜层32位于第一透明基板31背离发光单元2的一侧；第二透明基板33位于光学膜层32背离第一透明基板31一侧，第二透明基板33用于扩散入射光线并压合光学膜层32；
光学膜材结构3朝向侧壁面121的表面与承载台12侧壁面121之间的距离小于预设距离。
本公开提供的背光模组的背板6的边缘设置有框体1，背板6和框体1形成有容纳空间，框体1包括支撑台11和与支撑台11连接的承载台12，其中承载台12具有侧壁面121，侧壁面121朝向容纳空间，支撑台11具有支撑面111，支撑台11的支撑面111与承载台12的侧壁面121连接；在背板6的一侧上设置发光单元2，发光单元2和光学膜材结构3均位于容纳空间，光学膜材结构3在发光单元2的出光面的一侧，并且光学膜材结构3通过支撑台11的支撑面111支撑，关于光学膜材结构3具体包括由下到上的第一透明基板 31、光学膜层32和第二透明基板33，其中设置在框体1上的第一透明基板31在发光单元2的出光面的一侧，第一透明基板31将发光单元2的出射光线进行扩散，经过第一透明基板31扩散后的光线再次经过光学膜层32和第二透明基板33进行扩散，由于第一透明基板31和第二透明基板33的膨胀系数均较小，通过第二透明基板33和第一透明基板31的配合将光学膜层32压紧，可以有效减小位于第二透明基板33和第一透明基板31之间的光学膜层32发生褶皱，从而避免光学膜层32发生褶皱而导致的画面异常问题；在光学膜材结构3和承载台12的侧壁面121之间的距离小于预设距离，也就是光学膜材结构3朝向侧壁面121的一侧表面与侧壁面121之间留有一定的安装距离即可，由于光学膜材结构3和承载台12的侧壁面121之间的距离减小，从而进一步使得背光模组的边缘亮线可以明显减弱，从而改善一定视角范围下边缘亮线。
关于背板6与框体1通过连接件7连接，例如连接件7可以为螺栓。
请继续参考图4，本公开实施例提供的背光模组中的背板6为基体，在背板6的一侧安装有发光单元2，当然为了保证发光单元2的工作，在发光单元2朝向背板6的一侧设置有反射片22，反射片22用于提高对发光单元2发射光线的利用率，在反射片22朝向背板6的一侧还设置有柔性印刷电路板23，该柔性印刷电路板23与发光单元2电连接，以控制发光单元2工作。
例如框体1为铝框，光学膜材结构3包括由上到下依次设置的第一透明基板31、光学膜层32和第二透明基板33，其中第一透明基板31和第二透明基板33均为玻璃板，例如，为了增加第一透明基板31和第二透明基板33对光线的扩散作用，可以选用具有一定粗糙度的玻璃板，例如毛玻璃等；当然两个玻璃板的粗糙度可以相同也可以不同，第一透明基板31和第二透明基板33的两个玻璃板的可以均为毛玻璃，也可以是任意一个玻璃板为毛玻璃。
参考图1第一透明基板31、光学膜层32和第二透明基板33均置于支撑面111上，其中，第一透明基板31与支撑面111接触，为了保证支撑面111对光学膜材结构3的支撑强度，支撑面111与光学膜材结构3中的第一透明 基板31搭载宽度为1.5mm。一并参考图2，面板5设置于光学膜材结构3之上，承载台12具有与侧壁面121连接的承载面122，承载面122与支撑面111平行；承载面122与第二透明基板33背离光学膜层32的一侧表面位于同一平面。背光模组还包括位于光学膜材结构3背离发光单元2一侧的粘贴层4，通过粘贴层4固定于承载面122上；粘贴层4在发光单元2上的正投影，一部分与第二透明基板33接触，另一部分覆盖承载面122。例如粘贴层4为胶水，粘贴层4的厚度为0.2mm～0.3mm，粘贴层4一部分涂覆在支撑面111上，粘贴层4的另一部分涂覆在光学膜材结构3中的基材的上表面，粘贴层4一方面能达到良好的粘接效果，在显示装置竖直放置时光学膜材结构3中的各个膜层不会因向下移动而与框体1间产生较大缝隙；另一方面能阻挡发光单元2的光线从间隙中透过，从而有效提升画面质量。
继续参考图3，从图上可知，面板5、光学膜材结构3、框体1之间的位置关系，其中第二透明基板33的厚度为0.5mm，与框体1的承载面122平齐，且粘贴层4涂覆至第二透明基板33朝向面板5的一侧表面；光学膜材结构3中的光学膜层32包括第一扩散片321和第二扩散片322，光学膜层32的总共厚度为0.55mm；第一透明基板31的厚度为1.1mm，在整个第一透明基板31背离光学膜层32的一侧的整个表面设置有扩散层34，扩散层34例如为扩散油墨。因第一透明基板31和第二透明基板33为玻璃，所以第一透明基板31和第二透明基板33的膨胀系数较小，将光学膜材结构3中的第一透明基板31、第二透明基板33和光学膜层32的端面设计平齐，可以避免大尺寸背光源模组中因光学膜层32褶皱而导致的画面异常问题。由于上述方案无需导光条8和漫反射片22，不会出现光线堆积，因此不会产生亮线。在光学膜材结构3与框体1间只需预留d，d为0.45mm-0.55mm的组装间隙，例如组装间隙可以为0.5mm，背光模组的边缘的亮线效果可以明显减弱，从而改善特定视角下边缘亮线问题。
继续参考图3，由于粘贴层4的存在可以进一步地增加粘贴力，承载台12的厚度范围为0.45mm-0.55mm，例如为0.5mm，也就是框体1上用于承载 面122板的承载面122做到0.5mm，可进一步改善框体1遮挡像素问题，提升画面周边品质。
继续参考图4，背光模组还包括侧反射层9；侧反射层9位于框体1朝向容纳空间的一侧，以使发光单元2的出射光线反射至光学膜材结构3，图4中的虚线箭头代表发光单元2的光线路径。
如图5所示，第一透明基板31背离所述光学膜层32的一侧表面形成有扩散层34，例如，扩散层34为扩散油墨，对发光单元2发出的光线进行扩散。光学膜层32包括层叠设置的第一扩散片321和第二扩散片322，第一扩散片321和第二扩散片322的总共厚度为0.55mm。
如图10所示，为了使得本公开实施例提供的背光模组的光线更加均匀，发光单元2包括多组相互平行的灯条21；多组相互平行的灯条21中的任意灯条21中包括多个间隔设置的灯珠211，沿垂直灯条21的延伸方向，每组灯条21中的灯珠211一一对应设置。
例如，灯条21包括相互平行的8组灯条21，灯条21以图10中的虚线为中心呈中心对称分布，每组灯条21上均间隔排布14颗灯珠211，灯珠211以图10中的虚线为中心呈中心对称分布。例如灯条21的分布间距分别为54.5mm、90mm、74.6mm、……、74.6mm、90mm、54.5mm；灯珠211的分布间距分别为62.5mm、82mm、75.5mm、……、75.5mm、82mm、62.5mm。当然关于灯条21的分布间距可以根据实际情况进行选择，灯珠211的分布间隙也可以根据实际情况进行选择。
第二方面，如图6-图9所示，本公开提供的一种背光模组，包括：
背板6；
位于背板6一侧的发光单元2，发光单元2背离背板6的表面形成出光面；
围绕背板6边缘设置的框体1，背板6与框体1形成容纳空间，框体1包括支撑台11和与支撑台11连接的承载台12，其中承载台12具有朝向容纳空间的侧壁面121，支撑台11具有与侧壁面121连接的支撑面111；
位于支撑面111的导光条8，导光条8远离支撑面111的一侧形成有出光 面，导光条8具有与出光面连接的第一侧面和第二侧面，第一侧面与第二侧面相对设置，发光单元2的出射光线从第一侧面进入，导光条8的第二侧面与侧壁面121接触连接；
位于容纳空间的光学膜材结构3，光学膜材结构3包括层叠设置的扩散膜35和光学膜层32，扩散膜35设置在导光条8的出光面的一侧，光学膜材结构3还包括漫反射层36，漫反射层36设置在承载台12的侧壁面121上，且位于导光条8的出光面一侧。
在背板6的边缘设置有框体1，背板6和框体1形成有容纳空间，框体1包括支撑台11和与支撑台11连接的承载台12，其中承载台12具有侧壁面121，侧壁面121朝向容纳空间，支撑台11具有支撑面111，支撑台11的支撑面111与承载台12的侧壁面121连接；在背板6的一侧上设置发光单元2，发光单元2位于容纳空间，首先在支撑面111上先设置导光条8，导光条8远离支撑面111的一侧形成有出光面，导光条8具有与出光面连接的第一侧面和第二侧面，发光单元2的出射光线从导光条8的第一侧面进入，导光条8的第二侧面与侧壁面121接触连接，位于容纳空间的光学膜材结构3，光学膜材结构3包括层叠设置的扩散膜35和光学膜层32，扩散膜35设置在导光条8的出光面的一侧，光学膜材结构3还包括漫反射层36，然后漫反射层36设置在承载台12的侧壁面121上，且位于导光条8的出光面一侧，这时漫反射层36的厚度可遮挡导光条8与侧壁面121缝隙的出射光线，从而进一步使得背光模组的边缘亮线可以明显减弱，从而改善一定视角范围下边缘亮线。
如图6和如图7所示，例如框体1为铝框，光学膜层32的厚度为0.55mm，光学膜层32与框体1间隙为b＝0.2mm，扩散膜35的厚度1.5mm，扩散膜35与框体1间隙为a＝0.4mm，导光条8的厚度为1.4mm，与框体1间隙为0mm，漫反射层36的厚度为0.13mm，宽度h＝2.55mm。在制备过程中，先贴导光条8再贴漫反射层36，如图8所示，图8中的虚线箭头代表导光条8出光面的出射光线，因此漫反射层36厚度可遮挡导光条8与框体1缝隙的出射光线，从而可改善特定视角下的亮线可见现象。
继续参考图8，光学膜层32和扩散膜35在承载台12的侧壁面121的投影完全位于漫反射层36内，从而使得导光条8的出光面的出射光线尽可能的经过光学膜材结构3，导光条8的出光面的出射光线一部分经过扩散膜35和光学膜层32扩散至面板5，导光条8的出光面的出射光线另一部分经过漫反射层36反射至面板5。
在图9中，光学膜层32包括层叠设置的第一扩散片321和第二扩散片322，第一扩散片321和第二扩散片322和总共厚度为0.55mm。
当然，背光模组还包括覆盖承载面122的粘贴层4。通过粘贴层4将面板5固定于承载面122上；粘贴层4在发光单元2上的正投影完全覆盖承载面122。例如粘贴层4为胶水，粘贴层4的厚度为0.2mm～0.3mm。
可选地，背光模组还包括侧反射层9；侧反射层9位于框体1朝向容纳空间的一侧，以使发光单元2的出射光线反射至光学膜材结构3。
关于发光单元2继续参考图10，发光单元2包括多组相互平行的灯条21；
多组相互平行的灯条21中的任意灯条21中包括多个间隔设置的灯珠211，沿垂直灯条21的延伸方向，每组灯条21中的灯珠211一一对应设置，使得本公开实施例提供的背光模组的光线更加均匀。
例如，灯条21包括相互平行的8组灯条21，灯条21以图10中的虚线为中心呈中心对称分布，每组灯条21上均间隔排布14颗灯珠211，灯珠211以图10中的虚线为中心呈中心对称分布。例如灯条21的分布间距分别为54.5mm、90mm、74.6mm、……、74.6mm、90mm、54.5mm；灯珠211的分布间距分别为62.5mm、82mm、75.5mm、……、75.5mm、82mm、62.5mm。当然关于灯条21的分布间距可以根据实际情况进行选择，灯珠211的分布间隙也可以根据实际情况进行选择。
承载台12的厚度范围为0.45mm-0.55mm，例如为0.5mm，也就是框体1上用于承载面122板的承载面122做到0.5mm，可进一步改善框体1遮挡像素问题，提升画面周边品质。
第三方面，本公开提供一种显示装置，包括：第一方面任一项或第二方 面任一项的背光模组；
位于背光模组出光面一侧的面板5，面板5包括显示区51以及位于显示区51周边的非显示区52。
可选地，背光模组中的框体1的承载面122在面板5上的正投影位于非显示区52内。
由于框体1的承载台12的厚度范围为0.45mm-0.55mm，例如为0.5mm，也就是框体1上用于承载面122板的承载面122做到0.5mm，可进一步改善框体1遮挡像素问题，提升画面周边品质。
显然，本领域的技术人员可以对本公开实施例进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (12)

  1. 一种背光模组，其中，包括：
    背板；
    位于所述背板一侧的发光单元，所述发光单元背离所述背板的表面形成出光面；
    围绕所述背板边缘设置的框体，所述背板与所述框体形成容纳空间，所述框体包括支撑台和与所述支撑台连接的承载台，其中所述承载台具有朝向所述容纳空间的侧壁面，所述支撑台具有与所述侧壁面连接的支撑面；
    位于所述容纳空间的光学膜材结构，所述光学膜材结构位于所述发光单元的出光面的一侧，所述光学膜材结构通过所述支撑面支撑；所述光学膜材结构包括第一透明基板、光学膜层和第二透明基板，其中：所述第一透明基板位于所述发光单元出光面一侧，所述第一透明基板设置在所述框体上，所述第一透明基板用于扩散所述发光单元的出射光线；所述光学膜层位于所述第一透明基板背离所述发光单元的一侧；所述第二透明基板位于所述光学膜层背离所述第一透明基板一侧，所述第二透明基板用于扩散入射光线并压合所述光学膜层；
    所述光学膜材结构朝向所述侧壁面的表面与所述承载台侧壁面之间的距离小于预设距离。
  2. 根据权利要求1所述的背光模组，其中，所述预设距离的范围为0.45mm-0.55mm。
  3. 根据权利要求1或2所述的背光模组，其中，所述第一透明基板与所述支撑面接触。
  4. 根据权利要求3所述的背光模组，其中，所述第一透明基板背离所述光学膜层的一侧表面形成有扩散层。
  5. 根据权利要求1或4所述的背光模组，其中，所述光学膜层包括层叠设置的第一扩散片和第二扩散片。
  6. 根据权利要求5所述的背光模组，其中，所述承载台具有与所述侧壁面连接的承载面，所述承载面与所述支撑面平行；
    所述承载面与所述第二透明基板背离所述光学膜层的一侧表面位于同一平面。
  7. 根据权利要求6所述的背光模组，其中，所述背光模组还包括位于所述光学膜材结构背离所述发光单元一侧的粘贴层；所述粘贴层在所述发光单元上的正投影，一部分与所述第二透明基板接触，另一部分覆盖所述承载面。
  8. 根据权利要求1-7任一项所述的背光模组，其中，所述背光模组还包括侧反射层；所述侧反射层位于所述框体朝向所述容纳空间的一侧，以使所述发光单元的出射光线反射至所述光学膜材结构。
  9. 根据权利要求1-7任一项所述的背光模组，其中，所述发光单元包括多组相互平行的灯条；
    所述多组相互平行的灯条中的任意灯条中包括多个间隔设置的灯珠，沿垂直所述灯条的延伸方向，每组灯条中的灯珠一一对应设置。
  10. 根据权利要求1-7任一项所述的背光模组，其中，所述承载台的厚度范围为0.45mm-0.55mm。
  11. 一种显示装置，其中，包括：权利要求1-10任一项所述的背光模组；
    位于所述背光模组出光面一侧的面板，所述面板包括显示区以及位于所述显示区周边的非显示区。
  12. 根据权利要求11所述的显示装置，其中，所述背光模组中的框体的承载面在所述面板上的正投影位于所述非显示区内。
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