WO2023124338A1 - 背光模组和显示装置 - Google Patents

背光模组和显示装置 Download PDF

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Publication number
WO2023124338A1
WO2023124338A1 PCT/CN2022/122985 CN2022122985W WO2023124338A1 WO 2023124338 A1 WO2023124338 A1 WO 2023124338A1 CN 2022122985 W CN2022122985 W CN 2022122985W WO 2023124338 A1 WO2023124338 A1 WO 2023124338A1
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WO
WIPO (PCT)
Prior art keywords
lamp
light
backlight module
gap
emitting diodes
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Application number
PCT/CN2022/122985
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English (en)
French (fr)
Inventor
曾智
杨晓辉
袁海江
Original Assignee
绵阳惠科光电科技有限公司
惠科股份有限公司
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Application filed by 绵阳惠科光电科技有限公司, 惠科股份有限公司 filed Critical 绵阳惠科光电科技有限公司
Publication of WO2023124338A1 publication Critical patent/WO2023124338A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0025—Diffusing sheet or layer; Prismatic sheet or layer
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • 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
    • G02B6/0066—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 characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • G02B6/0055—Reflecting element, sheet or layer

Definitions

  • the present application relates to the field of display technology, in particular to a backlight module and a display device.
  • the transition between the light emitted by the lamp panel and the light reflected by the reflective sheet is relatively strong, and the fill light effect for the gap is not very good, and the reflection
  • the cost of the chip is relatively high, which is not conducive to reducing the cost.
  • the purpose of the present application is to provide a backlight module and a display device.
  • the light transition between the gap and the lamp panel is more uniform, and the production cost of the display device is reduced.
  • the present application discloses a backlight module, which includes a spliced lamp panel, the spliced lamp panel includes a plurality of lamp panels, a plurality of the lamp panels are spliced to form the lamp panel, and there are gaps between adjacent lamp panels , the backlight module further includes a diffuser plate, the diffuser plate is arranged at a position corresponding to the gap, and the diffuser plate covers at least one column of light-emitting diodes on at least one of the lamp boards, and the light-emitting diodes on the lamp board At least some of the LEDs are uncovered.
  • the present application also discloses a backlight module, which includes a spliced lamp panel, the spliced lamp panel includes a plurality of lamp panels, and a plurality of the lamp panels are spliced to form the spliced lamp panel.
  • the backlight module further includes a diffuser plate, the diffuser plate is arranged at a position corresponding to the gap, and the diffuser plate covers at least one column of light-emitting diodes on at least one of the lamp boards, and the lamp board At least part of the light-emitting diodes on the top is not covered; the diffusion plate simultaneously covers a row of the light-emitting diodes on the two lamp panels on both sides of the gap close to the gap; the diffusion plate and the diffusion plate A diffusion cavity is provided at the position corresponding to the covered light-emitting diodes, a safety distance is set between the inner wall of the diffusion cavity and the light-emitting diodes, and the shape of the diffusion cavity is hemispherical;
  • the backlight module also includes at least two first reflection sheets, the first reflection sheets are arranged on the side wall of the diffusion plate parallel to the slit; a row of LEDs covered by the diffusion plate are adjacent to each other.
  • the distance between two light-emitting diodes on the lamp board is smaller than the distance between two adjacent light-emitting diodes in a row of light-emitting diodes not covered by the diffusion plate on the lamp board;
  • the side is the first surface, and the side close to the light board is the second surface, the first surface and the second surface are opposite to each other, and the position corresponding to the first surface and the gap faces the second surface.
  • the surface is recessed to form an arc;
  • the lamp board includes a main body and a support part, and the support part is arranged on the side of the main body close to the gap;
  • the backlight module also includes a second reflection sheet, and the first The reflective surfaces of the two reflective sheets are attached to the second surface, and the second reflective sheet covers the gap;
  • the diffusion plate covers the gap, the side of the diffusion plate away from the gap is a first surface, the side close to the gap is a second surface, and the first surface abuts against the support portion, The second surface is flush with the light emitting surface of the light board, and the light emitting diodes covered by the diffusion plate are located between the support portion and the diffusion plate.
  • the present application also discloses a display device, the display device includes a display panel and the above-mentioned backlight module, the backlight module is set corresponding to the display panel, and the backlight module provides the display panel with Backlight.
  • this application arranges a diffusion plate at the gaps, and the diffusion plates cover at least one row of light-emitting diodes in at least one of the lamp panels close to the gaps, and the lamps
  • the light on the panel is evenly distributed into the diffuser plate, and the evenly distributed light is softer.
  • the light transition between the gap and the light panel is more uniform, and the cost of the diffuser plate is lower. Low, saving production costs.
  • Fig. 1 is a cross-sectional schematic diagram of a diffuser plate installed in the gap of a spliced lamp panel according to the first embodiment of the present application;
  • Fig. 2 is a schematic cross-sectional view of a diffuser plate arranged in the gap of the second spliced lamp panel of the first embodiment of the present application;
  • Fig. 3 is a schematic diagram of a plane of a spliced lamp panel according to the first embodiment of the present application
  • Fig. 4 is a cross-sectional schematic diagram of a diffuser plate installed in the gap of the third type of spliced lamp panel according to the first embodiment of the present application;
  • Fig. 5 is a schematic cross-sectional view of a diffusion plate provided in the gap of a spliced lamp panel according to the second embodiment of the present application;
  • Fig. 6 is a schematic cross-sectional view of a diffusion plate arranged in the gap of a spliced lamp panel according to the third embodiment of the present application;
  • Fig. 7 is a cross-sectional schematic diagram of a diffuser plate installed in the gap of a spliced lamp panel according to the fourth embodiment of the present application;
  • FIG. 8 is an exploded schematic diagram of a display device according to an embodiment of the present application.
  • Fig. 1 is a cross-sectional schematic diagram of a diffuser plate provided in the gap of a spliced lamp panel according to the first embodiment of the present application.
  • a backlight module 20 is disclosed, and the backlight module includes a spliced lamp panel 200 , the spliced lamp panel 200 is spliced by a plurality of lamp panels 210, and there is a gap 220 between adjacent lamp panels 210, and the backlight module 20 further includes a diffuser plate 240, and the diffuser plate 240 is arranged on The position corresponding to the gap 220, and the diffuser plate 240 covers at least one row of LEDs 230 on at least one lamp board 210, and at least part of the LEDs 230 on the lamp board 210 is not covered.
  • the diffuser plate 240 can only cover the light emitting diodes 230 on one lamp panel 210, and the diffuser plate 240 can also cover the light emitting diodes 230 on two adjacent lamp panels 210 at the same time, and can only cover one row
  • the light emitting diodes 230 can also cover multiple rows of light emitting diodes 230.
  • the diffusion plate 210 simultaneously covers a row of the light emitting diodes on the two lamp panels 210 on both sides of the gap 220 close to the gap 220. 230 as an example for explanation.
  • a diffuser plate 240 is provided at the gap 220, and the diffuser plate 240 covers a row of light-emitting diodes 230 on two adjacent lamp panels 210 respectively, so that two adjacent diffuser plates 240 The lights of the LEDs 230 are led into the diffuser plate 240, and then fill the light at the gap 220 of the spliced lamp panel 200.
  • this The application applies to diffuse the light on the lamp panel 210 into the diffusion plate 240.
  • the diffused light is softer, and on the basis of supplementing the light at the gap 220, the gap 220 and The light transition between the lamp panels 210 is more uniform, and compared with the reflection sheet, the cost of the diffusion plate 240 is lower, which can save the production cost.
  • the diffuser plate 240 is fixedly connected to one of the adjacent lamp panels 210, and the diffuser plate 240 can be opposite to the other adjacent lamp panel 210.
  • One of the lamp panels 210 moves, because the thickness of the diffuser plate 240 is between 1.5 mm and 2 mm, it is very brittle, and it is easy to break if bumped, and the lamp panel 210 will be thermally expanded due to the influence of the environment Cold shrinkage produces a certain deformation, so this application uses the diffuser plate 240 to be fixedly connected to one of the lamp panels 210, and is not connected to the other lamp panel 210 of the adjacent lamp panel 210.
  • the light board 210 and the diffuser plate 240 are equivalent to a floating connection, which can prevent the stress caused by the deformation of the light board 210 from being applied to the diffuser plate 240 and cause the diffuser plate 240 to be damaged.
  • a through hole can be provided on the diffuser plate 240, and the support column 280 on the lamp panel 210 can be moved to a position corresponding to the through hole for fixed connection.
  • the thickness of the diffuser plate 240 is the same as the height of the support column 280, and the diffuser plate 240 can also play a role in supporting the optical film 300, so that the point support of the support column 280 becomes a surface support , to prevent the display device 10 from forming dark spots corresponding to the positions of the support columns 280 during display.
  • the diffuser plate 240 can also be pasted on the lamp panel 210 with an adhesive tape, and the operation is more simple.
  • the diffusion plate 240 is provided with a diffusion cavity 243 at a position corresponding to the light emitting diodes 230 covered by the diffusion plate, and a safety distance is set between the diffusion cavity 243 and the light emitting diodes 230 .
  • the safe distance is the distance that the LEDs 230 will move along with the light board 210 when the light board 210 expands with heat and contracts with cold, and a distance greater than this is the safe distance.
  • the diffusion cavity 243 is provided at the position corresponding to the diffusion plate 240 and the light emitting diode 230, so that the diffusion plate 240 and the light panel 210 are closely attached, and the heat generated by the light emitting diode 230 will not be directly transmitted to the diffusion plate 240. board 240.
  • a safety distance is provided between the inner wall of the diffusion cavity 243 and the light emitting diode 230 to ensure that there is no collision between the diffusion plate 240 and the light emitting diode 230, and to prevent the light emitting diode 230 and the diffusion plate 240 from being damaged. .
  • the diffuser plate 240 is relatively brittle, and it is very easy to be damaged once bumped, so it is necessary to reserve a safety distance in advance to prevent the diffuser plate 240 from colliding with the light-emitting diodes 230 from being damaged.
  • the safe distance ranges from 0.1 mm to 0.2 mm.
  • 0.15 mm is used, which will not make the diffusion cavity 243 too large and reduce the uniform light effect, and also ensure that the inner wall of the diffusion cavity 243 is not in contact with the The contact of the light emitting diode 230 is collided.
  • the shape of the diffusion chamber 243 is hemispherical. Compared with the solution of setting the diffusion cavity 243 as a through hole, the hemispherical diffusion cavity 243 has a better uniform light effect, and can transmit more light from the light emitting diode 230 to the diffusion plate 240, improving the The brightness of the diffuser plate 240 as a whole.
  • the backlight module 20 further includes at least two first reflective sheets 271 , and the first reflective sheets 271 are arranged on the sidewall of the diffusion plate 240 parallel to the slit 220 .
  • the light emitted by the light emitting diodes 230 covered by the diffusion plate 240 is reflected toward the middle of the diffusion plate to improve the brightness of the diffusion plate 240.
  • the first reflection sheet 271 is disposed between the light-emitting diodes 230 covered by the diffusion sheet 240 on the lamp panel 210 and the supporting columns 280 .
  • the first reflection sheet 271 can be assembled with the diffuser plate 240 by glue, and the operation is more simple; it is also possible to set a through groove at the position corresponding to the diffuser plate 240 to attach the first reflector 271
  • the reflective sheet 271 is disposed inside the diffuser plate 240 , so that the reflectivity of the first reflective sheet 271 will not be affected if no glue is applied to the reflective surface of the first reflective sheet 271 .
  • the brightness of the LEDs 230 covered by the diffusion plate 240 can be adjusted. That is, using the local dimming technology, the two rows of light-emitting diodes 230 covered by the diffuser plate 240 are separated into local light, and then the local dimming module in the display device is used to locally control the area in real time and adjust the light individually.
  • the brightness of the light emitting diodes 230 covered by the diffusion plate 240 can balance the light of the entire display panel 600 , so that the light of the entire display panel 600 looks more uniform.
  • the distance between two adjacent LEDs 230 in a row of LEDs 230 covered by the diffuser plate 240 is smaller than the distance between two adjacent LEDs 230 in a row not covered by the diffuser plate 240 on the lamp panel 210 .
  • the spacing between the LEDs 230 increases the brightness of the corresponding position of the diffusion plate 240 by increasing the density of the LEDs 230 covered by the diffusion plate 240 .
  • the reflective surface of the second reflective sheet is attached to the second surface, and the second reflective sheet covers the gap.
  • the backlight module 20 also includes a second reflection sheet 272, the side of the diffusion plate 240 away from the light board 210 is the first surface 241, and the side close to the light board 210 is the second surface 242, so The first panel is disposed opposite to the second surface 242 , the reflective surface of the second reflective sheet 272 is attached to the second surface 241 , and the second reflective sheet covers the gap 220 .
  • the reflective surface of the second reflective sheet 272 By attaching the reflective surface of the second reflective sheet 272 to the first surface 241, it can reflect the light of the diffusion plate 240 corresponding to the gap 220, and improve the utilization rate of light. And compared to the solution of simply setting the reflective sheet at the gap 220, the reflective sheet needs to be connected to the two adjacent lamp panels 210, but cannot cover the light-emitting diodes 230 near the gap 220. Generally, adhesive tape is used to Paste the reflector on the two rows of light-emitting diodes 230 near the gap 220 of the two adjacent lamp panels 210.
  • the second reflection sheet 272 is pasted on the diffuser plate 240 , so there is no need to consider how to connect the second reflection sheet 272 to the lamp panel 210 .
  • Fig. 3 is a schematic diagram of a spliced lamp panel plane according to the first embodiment of the present application.
  • the spliced lamp panel 200 is formed by splicing a plurality of the lamp panels 210, and the gap At 220, a plurality of diffusion plates 240 are integrally formed.
  • the multiple lamp panels 210 of the spliced lamp panel 200 often have more than one gap 220 formed by splicing, and the diffuser plates 240 at the junction of the gaps 220 will be stacked together, and by splicing the lamp panels All the diffusion plates 240 on the 200 are integrally formed, which can not only ensure that the upper diffusion plates 240 at the junction of the gaps 220 do not need to be stacked, so that the light at this position will not be too dark, but also facilitate assembly, ensuring that the adjacent diffusion plates 240 a solid connection between them.
  • the lamp board 210 is provided with n columns of light-emitting diodes, and the diffusion plate covers m columns of light-emitting diodes on any one of the two adjacent lamp boards; or the lamp board is provided with n rows Light-emitting diodes, the diffusion plate covers m rows of light-emitting diodes on any one of the two adjacent lamp panels; where 1 ⁇ m ⁇ n/2.
  • Fig. 4 is a cross-sectional schematic diagram of a diffuser plate installed in the gap of the third spliced lamp panel of the first embodiment of the present application.
  • the side of the diffuser plate 240 away from the lamp panel 210 is the first
  • the surface 241 the side close to the lamp board 210
  • the first panel and the second surface 242 are oppositely arranged, and the position corresponding to the first surface 241 and the slit 220 faces the
  • the second surface 242 is recessed to form an arc.
  • the light when it is transmitted in the diffusion plate 240, when it reaches the concave arc, the light will travel along the arc toward the center of the arc, and the center of the arc just corresponds to the position of the slit 220 , making the light in the gap 220 brighter, and further improving the brightness of the gap 220 in the spliced light panel 200 .
  • Fig. 5 is a cross-sectional schematic diagram of a diffusion plate installed in the gap of a spliced lamp panel according to the second embodiment of the present application.
  • the difference from the first embodiment is that , discloses a diffuser plate 240, the diffuser plate 240 includes a horizontal portion 244 and a vertical portion 245, the horizontal portion 244 is arranged horizontally relative to the lamp panel 210, and the vertical portion 245 is arranged horizontally relative to the horizontal portion
  • the portion 244 is vertically arranged, and the vertical portion 245 is arranged at the gap 220 , one end is connected to the horizontal portion 244 , and the other end is fixedly connected to the back plate 100 .
  • Fig. 6 is a schematic cross-sectional view of a diffuser plate installed in the gap of a spliced lamp panel according to the third embodiment of the present application.
  • the difference from the first embodiment is that , discloses a lamp panel 210, the lamp panel 210 includes a support part 212 of the main body part 211, the support part 212 is arranged on the side of the main part 211 close to the gap 220, and the diffusion plate 240 covers The slit 220 , the side of the diffusion plate 240 away from the slit 220 is a first surface, the side close to the slit 220 is a second surface, and the first surface abuts against the support portion 212 , The second surface is flush with the light emitting surface of the lamp board 210 , and the LEDs 230 covered by the diffuser plate 240 are located between the support portion 212 and the diffuser plate 240 .
  • the diffuser plate 240 is supported by setting a support portion 212 on the lamp panel 210, and a row of light-emitting diodes 230 on the lamp panel 210 near the gap 220 is moved to the support portion 212, the The surface of the diffusion plate 240 is flush with the light-emitting surface of the light panel 210 , so as to prevent other structures of the display device 10 from being squeezed due to the excessive thickness of the diffusion plate 240 .
  • Fig. 7 is a schematic cross-sectional view of a diffusion plate provided in the gap of a spliced lamp panel according to the fourth embodiment of the present application.
  • a lamp panel 210 is disclosed, so A slope 213 and a side wall 214 are provided on the side of the light board 210 close to the gap, and the upper surface, the slope 213 , the side wall 214 and the lower surface of the light board 210 are sequentially connected.
  • the light-emitting surface of the lamp panel 210 is the upper surface of the lamp panel 210, and the side of the lamp panel 210 connected to the back panel, that is, the side away from the light-emitting surface of the lamp panel 210 is the lower surface of the lamp panel 210 ;
  • the side wall 214 is perpendicular to the lower surface of the lamp panel 210 and the upper surface of the lamp panel 210, the inclined plane faces above the gap 220, and the side of the light emitting surface of the lamp panel 210 is upward; Reflective paper (not shown) with high reflectivity is arranged on the inclined surface to supplement the light above the slit 220 .
  • a light emitting diode 230 is disposed on the inclined surface 213 to further supplement light above the slit 220 .
  • a gap is provided between the second reflective sheet 272 and the slope 213 to avoid collision between the second reflective sheet 272 and the slope 213 .
  • FIG. 8 is an exploded schematic diagram of a display device according to an embodiment of the present application.
  • a display device 10 is disclosed.
  • the display device 10 includes a display panel 600 and a backlight module 20.
  • the backlight module 20 is disposed corresponding to the display panel 600 , and the backlight module 20 provides a backlight for the display panel 600 .
  • the backlight module 20 includes a backplane 100 and a splicing lamp panel 200
  • the display device 10 further includes an optical film 300, a plastic frame and a foam 500
  • the backplane 100, the splicing lamp panel 200 , the optical film 300 , the foam 500 and the display panel 600 are stacked in sequence
  • the plastic frame 400 surrounds the back panel 100 , the spliced lamp panel 200 , the optical film 300 , the The edge of the foam 500 and the display panel 600 is arranged.
  • the display device 10 also includes a local dimming module (not shown), which adjusts the local light source of the spliced light panel 200 .
  • the spliced lamp panel 200 is provided with a diffuser plate 240 at the gap 220, and the diffuser plate 240 covers at least one row of light-emitting diodes 230 in at least one of the lamp panels 210 close to the gap 220, and the lamp panel 210
  • the diffused light is evenly distributed into the diffusion plate 240, and the diffused light is softer.
  • the light transition between the gap 220 and the lamp panel 210 is more uniform, and the diffuser plate 240
  • the manufacturing cost is lower, the production cost is saved, and the display effect of the display device 10 is improved.
  • inventive concept of the present application can form a lot of embodiments, but the space of the application documents is limited and cannot be listed one by one. Therefore, on the premise of not conflicting, the above-described embodiments or each The technical features can be combined arbitrarily to form new embodiments, and the original technical effects will be enhanced after each embodiment or technical features are combined

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  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
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Abstract

本申请公开了一种背光模组(20)和显示装置(10)，所述背光模组(20)包括拼接灯板(200)，所述拼接灯板(200)包括多个灯板(210)，多个所述灯板(210)拼接形成所述拼接灯板(200)，相邻的所述灯板(210)之间具有缝隙(220)，所述背光模组(20)还包括扩散板(240)，所述扩散板(240)设置在与所述缝隙(220)对应的位置，且所述扩散板(240)覆盖至少一个所述灯板(210)上的至少一列发光二极管(230)，所述灯板(210)上的至少部分发光二极管(230)未被覆盖。

Description

背光模组和显示装置
本申请要求于2021年12月29日提交中国专利局，申请号为CN202111634428.8，申请名称为“背光模组和显示装置”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
本申请涉及显示技术领域，尤其涉及一种背光模组和显示装置。
背景技术
这里的陈述仅提供与本申请有关的背景信息，而不必然地构成现有技术。
目前，Mini LED拼接屏相邻的两个灯板之间有一定间隙，以提供灯板热胀冷缩的空间，致使显示装置在显示时对应缝隙处出现暗线等问题，而普遍的做法是用反射片来盖住相邻灯板之间的缝隙，对缝隙处进行补光。
但是，依靠反射片在缝隙处进行反射，会使得显示面板在整体上看时，灯板发出的光和反射片反射出的光过渡比较强硬，对缝隙出的补光效果不是很好，而且反射片的成本较高，不利于降低成本。
发明内容
本申请的目的是提供一种背光模组和显示装置，在对缝隙处进行补光的基础上，使缝隙处和灯板之间的光过渡得更加的均匀，降低显示装置的生产成本。
本申请公开了一种背光模组，包括拼接灯板，所述拼接灯板包括多个灯板，多个所述灯板拼接形成所述灯板，相邻的所述灯板之间具有缝隙，所述背光模组还包括扩散板，所述扩散板设置在与所述缝隙对应的位置，且所述扩散板覆盖至少一个所述灯板上的至少一列发光二极管，所述灯板上的至少部分发光二极管未被覆盖。
本申请还公开了一种背光模组，包括拼接灯板，所述拼接灯板包括多个灯板，多个所述灯板拼接形成所述拼接灯板，相邻的所述灯板之间具有缝隙，所述背光模组还包括扩散板，所述扩散板设置在与所述缝隙对应的位置，且所述扩散板覆盖至少一个所述灯板上的至少一列发光二极管，所述灯板上的至少部分发光二极管未被覆盖；所述扩散板同时覆盖所述缝隙两边的两个所述灯板上的靠近所述缝隙的一列所述发光二极管；所述扩散板与被所述扩散板覆盖的发光二极管对应的位置上设置有扩散腔，所述扩散腔的内壁与所述发光二极管之间设置有安全距离，所述扩散腔的形状为半球形；
所述背光模组还包括至少两个第一反射片，所述第一反射片设置在与所述缝隙平行的所述扩散板的侧壁上；被所述扩散板覆盖的一列发光二极管相邻的两个发光二极管之间的间距，小于所述灯板上未被所述扩散板覆盖的一列发光二极管相邻的两个发光二极管之间的间距；所述扩散板远离所述灯板的一侧为第一表 面，靠近所述灯板的一侧为第二表面，所述第一表面和所述第二表面相对设置，所述第一表面与所述缝隙对应位置处朝向所述第二表面凹陷形成弧形；所述灯板包括主体部和支撑部，所述支撑部设置在所述主体部靠近所述缝隙的一侧；所述背光模组还包括第二反射片，所述第二反射片的反射面贴合在所述第二表面上，且所述第二反射片覆盖所述缝隙；
所述扩散板覆盖所述缝隙，所述扩散板远离所述缝隙的一侧为第一表面，靠近所述缝隙的一侧为第二表面，所述第一表面与所述支撑部抵接，所述第二表面与所述灯板的出光面平齐，被所述扩散板覆盖的发光二极管位于所述支撑部与所述扩散板之间。
本申请还公开了一种显示装置，所述显示装置包括显示面板以及上述所述的背光模组，所述背光模组与所述显示面板对应设置，所述背光模组为所述显示面板提供背光源。
相对于在缝隙处设置反射片的方案来说，本申请通过在缝隙处设置扩散板，且所述扩散板覆盖至少一个所述灯板中靠近所述缝隙的至少一列发光二极管，将所述灯板上的光匀到扩散板中，匀过来的光更加的柔和，在对缝隙处进行补光的基础上，缝隙处和灯板之间的光过渡得更加的均匀，而且扩散板的造价更低，节约了生产成本。
附图说明
所包括的附图用来提供对本申请实施例的进一步的理解，其构成了说明书的一部分，用于例示本申请的实施方式，并与文字描述一起来阐释本申请的原理。显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。在附图中：
图1是本申请的第一种实施例的一种拼接灯板缝隙处设置扩散板的截面示意图；
图2说本申请的第一种实施例的第二种拼接灯板缝隙处设置扩散板的截面示意图；
图3是本申请的第一种实施例的一种拼接灯板平面的示意图；
图4是本申请的第一种实施例的第三种拼接灯板缝隙处设置扩散板的截面示意图；
图5是本申请的第二种实施例的一种拼接灯板缝隙处设置扩散板的截面示意图；
图6是本申请的第三种实施例的一种拼接灯板缝隙处设置扩散板的截面示意图；
图7是本申请的第四种实施例的一种拼接灯板缝隙处设置扩散板的截面示意图；
图8是本申请的一实施例的显示装置的爆炸示意图。
具体实施方式
需要理解的是，这里所使用的术语、公开的具体结构和功能细节，仅仅是为了描述具体实施例，是代表性的，但是本申请可以通过许多替换形式来具体实现，不应被解释成仅受限于这里所阐述的实施例。
下面参考附图和可选的实施例对本申请作详细说明。
实施例一：
图1是本申请的第一种实施例的一种拼接灯板缝隙处设置扩散板的截面示意图，如图1所示，公开一种背光模组20，所述背光模组包括拼接灯板200，所述拼接灯板200由多个灯板210拼接而成，相邻的所述灯板210之间具有缝隙220，所述背光模组20还包括扩散板240，所述扩散板240设置在与所述缝隙220对应的位置，且所述扩散板240覆盖至少一个所述灯板210上的至少一列发光二极管230，所述灯板210上的至少部分发光二极管230未被覆盖。
具体的所述扩散板240可以只覆盖一边的灯板210上的发光二极管230，所述扩散板240也可以同时覆盖相邻的两个灯板210上的发光二极管230，并且既可以只覆盖一列发光二极管230，还可以覆盖多列发光二极管230，本实施例以所述扩散板210同时覆盖所述缝隙220两边的两个所述灯板210上的靠近所述缝隙220的一列所述发光二极管230为例进行解释说明。
本实施例通过在所述缝隙220处设置扩散板240，而且所述扩散板240覆盖相邻的两个所述灯板210上各自的一列发光二极管230，将相邻的两个扩散板240上的发光二极管230的灯引到扩散板240中，进而对所述拼接灯板200的缝隙220处进行补光，相比于直接在所述缝隙220处设置所述反射片的方案来说，本申请将所述灯板210上的光匀到扩散板240中，从显示面板600的整体上看，匀过来的光更加的柔和，且在对缝隙220处进行补光的基础上，缝隙220和灯板210之间的光过渡得更加的均匀，而且相比于反射片，扩散板240的造价更低，可以节约了生产成本。
其中，结合图2所示，所述扩散板240与相邻所述灯板210中的其中一个灯板210固定连接，且所述扩散板240可相对于相邻所述灯板210中的另一个所述灯板210移动，由于所述扩散板240的厚度为1.5mm-2mm之间，是非常脆的，如果发生磕碰就很容易破裂，并且所述灯板210会受环境的影响热胀冷缩产生一定的形变，所以本申请通过采用扩散板240与一个所述灯板210固定连接，与相邻的所述灯板210的另一个灯板210之间不连接，当所述灯板210产生形变时，灯板210和扩散板240之间相当于浮动连接，可以防止因为所述灯板210的形变产生的应力施加在所述扩散板240上，使得所述扩散板240发生破损。
具体的，可以通过在扩散板240上设置通孔，并将所述灯板210上的支撑柱280移到与所述通孔对应位置处进行固定连接，相比于直接采用胶水粘贴的方式，更加容易安装，不需要定位，且方便后期的拆卸。
并且，所述扩散板240的厚度与所述支撑柱280的高度相同，所述扩散板240还可以起到对光学膜片300支撑的作用，使得所述支撑柱280的点支撑变成面支撑，防止所述显示装置10在显示时对应所述支撑柱280位置形成暗点。当然还可以使用胶带将所述扩散板240粘贴在所述灯板210上，操作更加的简单。
其中，所述扩散板240与被所述扩散板覆盖的发光二极管230对应的位置上 设置有扩散腔243，所述扩散腔243与所述发光二极管230之间设置有安全距离。所述安全距离是当所述灯板210发生热胀冷缩时，所述发光二极管230会跟随所述灯板210移动的距离，大于此距离即为安全距离。在所述扩散板240与发光二极管230对应的位置设置所述扩散腔243，使得所述扩散板240与所述灯板210贴合紧密，所述发光二极管230产生的热量不会直接传到扩散板240上。并且所述扩散腔243的内壁和所述发光二极管230之间设置有安全距离，保证所述扩散板240与所述发光二极管230之间不发生磕碰，防止所述发光二极管230以及扩散板240破损。
最主要的是，所述扩散板240比较脆，一旦发生磕碰，极易发生破损，所以需要通过提前预留安全距离，防止所述扩散板240与所述发光二极管230磕碰破损。所述安全距离的范围为0.1mm-0.2mm，可选地，采用0.15mm，即不会使得扩散腔243太大，而导致匀光的效果降低，也保证了扩散腔243内壁不与所述发光二极管230接触发生磕碰。
进一步的，所述扩散腔243的形状为半球形。相比于将所述扩散腔243设置成通孔的方案来说，半球形的扩散腔243具有较好的匀光效果，可以把发光二极管230的光更多的传输到扩散板240中，提高扩散板240整体的亮度。
其中，所述背光模组20还包括至少两个第一反射片271，所述第一反射片271设置在与所述缝隙220平行的所述扩散板240的侧壁上。将被所述扩散板240覆盖的发光二极管230发出的光朝向所述扩散板中部反射，提高所述扩散板240的亮度，具体的，在扩散板240与灯板210通过支撑柱280进行固定的一侧，所述第一反射片271设置在该灯板210上被所述扩散片240覆盖的发光二极管230和支撑柱280之间。所述第一反射片271可以采用粘胶的方式与所述扩散板240进行装配，操作更加的简单；也可以采用在所述扩散板240对应的位置设置通槽的方式，将所述第一反射片271设置在所述扩散板240内，这样不在第一反射片271的反射面涂胶不会影响第一反射片271的反射率。
并且，被所述扩散板240覆盖的发光二极管230，亮度可调节。即，使用局域调光技术，将所述扩散板240覆盖的两列发光二极管230分离成局域光，再通过显示装置中的局域调光模块，实时对该区域进行局部控制，单独调节被所述扩散板240覆盖的所述发光二极管230的亮度，可以平衡整个显示面板600的光，使得整个显示面板600的光看上去更加的均匀。
被所述扩散板240覆盖的一列发光二极管230相邻的两个发光二极管230之间的间距，小于所述灯板210上未被所述扩散板240覆盖的一列发光二极管230相邻的两个发光二极管230之间的间距，即通过增加所述扩散板240覆盖的所述发光二极管230的密度，提高所述扩散板240对应位置的亮度。
所述第二反射片的反射面贴合在所述第二表面上，且所述第二反射片覆盖所述缝隙。
所述背光模组20还包括第二反射片272，所述扩散板240远离所述灯板210的一侧为第一表面241，靠近所述灯板210的一侧为第二表面242，所述第一面板和所述第二表面242相对设置，所述第二反射片272的反射面贴合在所述第二表面241上，所述第二反射片覆盖所述缝隙220。
通过将所述第二反射片272的反射面贴合在所述第一表面241上，可以对所述扩散板240对应所述缝隙220处的光起到反射的作用，提高光的利用率，并且相对于单纯在所述缝隙220处的设置反射片的方案来说，反射片需要与相邻两块灯板210连接，但是不能覆盖到靠近所述缝隙220处的发光二极管230，一般采用胶带将所述反射片贴在，所述相邻两块灯板210靠近所述缝隙220处的两列发光二极管230上，此时可操作的位置就十分的小，操作十分不便；而本申请将所述第二反射片272贴在所述扩散板240上，就不需要考虑到第二反射片272和灯板210之间怎么连接的问题。
图3是本申请的第一种实施例的一种拼接灯板平面的示意图，如图3所示，所述拼接灯板200由多个所述灯板210拼接而成，并且，所述缝隙220处的，多条所述扩散板240一体成型设置。由于所述拼接灯板200的多个灯板210拼接形成的所述缝隙220往往不只有一条，而所述缝隙220交界处的扩散板240就会堆叠在一起，而通过将所述拼接灯板200上的所以扩散板240一体成型，既能保证所述缝隙220的交界处上扩散板240不用堆叠设置，不会使得该位置的光线过暗，而且还方便组装，保证相邻扩散板240之间的稳固连接。
所述灯板210上设置有n列发光二极管，所述扩散板覆盖相邻的两个所述灯板中的任一灯板上的m列发光二极管；或所述灯板上设置有n行发光二极管，所述扩散板覆盖相邻的两个所述灯板中的任一灯板上的m行发光二极管；其中1≤m＜n/2。
图4是本申请的第一种实施例的第三种拼接灯板缝隙处设置扩散板的截面示意图，如图4所示，所述扩散板240远离所述灯板210的一侧为第一表面241，靠近所述灯板210的一侧为第二表面242，所述第一面板和所述第二表面242相对设置，所述第一表面241与所述缝隙220对应位置处朝向所述第二表面242凹陷形成弧形。
具体的，光在扩散板240中传输时，当传到凹陷的弧形上时，光会沿着弧形，朝着弧心处传出，而所述弧心正好对应所述缝隙220的位置，使得所述缝隙220的光更加的亮，进一步的提升拼接灯板200缝隙220处的光亮度。
实施例二：
图5是本申请的第二种实施例的一种拼接灯板缝隙处设置扩散板的截面示意图，如图5所示，作为本申请的第二种实施例，和第一实施例不同的是，公开了一种扩散板240，所述扩散板240包括水平部244和竖直部245，所述水平部244相对于所述灯板210水平设置，所述竖直部245相对于所述水平部244垂直设置，且所述竖直部245设置在所述缝隙220处，一端与所述水平部244连接，另一端与所述背板100固定连接。且所述竖直部245和所述灯板210之间设置有安全距离，通过竖直部245将所述扩散板240固定在所述背板100上，可以防止因为所述灯板210热胀冷缩时与所述扩散板240发生磕碰，避免所述扩散板240发生破损。
实施例三：
图6是本申请的第三种实施例的一种拼接灯板缝隙处设置扩散板的截面示意图，如图6所示，作为本申请的第二种实施例，和第一实施例不同的是，公开了 一种灯板210，所述灯板210包括主体部211的支撑部212，所述支撑部212设置在所述主体部211靠近所述缝隙220的一侧，所述扩散板240覆盖所述缝隙220，所述扩散板240远离所述缝隙220的一侧为第一表面，靠近所述缝隙220的一侧为第二表面，所述第一表面与所述支撑部212抵接，所述第二表面与所述灯板210的出光面平齐，被所述扩散板240覆盖的发光二极管230位于所述支撑部212与所述扩散板240之间。所述扩散板240的高度加上所述支撑部212的高度等于所述主体部211的高度。
通过在所述灯板210上设置支撑部212来支撑所述扩散板240，并且将所述灯板210上靠近所述缝隙220处的一列发光二极管230移到所述支撑部212上，所述扩散板240的表面和所述灯板210的发光面平齐，避免因为所述扩散板240的厚度过大而挤压显示装置10的其它结构。
实施例四：
图7是本申请的第四种实施例的一种拼接灯板缝隙处设置扩散板的截面示意图，如图7所示，和第一实施例不同的是，公开了一种灯板210，所述灯板210靠近所述缝隙的一侧上设置有一斜面213和一侧壁214，所述灯板210的上表面、斜面213、侧壁214和所述灯板210的下表面依次连接。
其中，所述灯板210的出光面为灯板210的上表面，所述灯板210与背板连接的一面，即远离所述灯板210的出光面的一侧为灯板210的下表面；所述侧壁214与所述灯板210的下表面、所述灯板210的上表面垂直，所述斜面朝向所述缝隙220的上方，所述灯板210的出光面一侧为上方；所述斜面上设置有高反射率的反射纸(未示出)，对所述缝隙220处的上方进行补光。
其中，所述斜面213上设置有发光二极管230，进一步对所述缝隙220的上方进行补光。所述第二反射片272与所述斜面213之间设置有间隙，避免所述第二反射片272与所述斜面213之间发生磕碰。
图8是本申请的一实施例的显示装置的爆炸示意图，如图8所示，公开了一种显示装置10，所述显示装置10包括显示面板600和背光模组20，所述背光模组20与所述显示面板600对应设置，所述背光模组20为所述显示面板600提供背光源。
具体的，所述背光模组20包括背板100和拼接灯板200，所述显示装置10还包括光学膜片300、胶框和泡棉500，所述背板100、所述拼接灯板200、所述光学膜片300、所述泡棉500和所述显示面板600依次堆叠设置，所述胶框400环绕所述背板100、所述拼接灯板200、所述光学膜片300、所述泡棉500和所述显示面板600边缘设置。所述显示装置10还包括局域调光模块(未示出)，对所述拼接灯板200的局部光源进行调节。
所述拼接灯板200通过在缝隙220处设置扩散板240，且所述扩散板240覆盖至少一个所述灯板210中靠近所述缝隙220的至少一列发光二极管230，将所述灯板210上的光匀到扩散板240中，匀过来的光更加的柔和，在对缝隙220处进行补光的基础上，缝隙220处和灯板210之间的光过渡得更加的均匀，而且扩散板240的造价更低，节约了生产成本，提升了显示装置10的显示效果。
需要说明的是,本申请的发明构思可以形成非常多的实施例，但是申请文件 的篇幅有限，无法一一列出，因而，在不相冲突的前提下,以上描述的各实施例之间或各技术特征之间可以任意组合形成新的实施例，各实施例或技术特征组合之后，将会增强原有的技术效果
以上内容是结合具体的可选实施方式对本申请所作的进一步详细说明，不能认定本申请的具体实施只局限于这些说明。对于本申请所属技术领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干简单推演或替换，都应当视为属于本申请的保护范围。

Claims (20)

  1. 一种背光模组，包括拼接灯板，所述拼接灯板包括多个灯板，多个所述灯板拼接形成所述拼接灯板，相邻的所述灯板之间具有缝隙，所述背光模组还包括扩散板，所述扩散板设置在与所述缝隙对应的位置，且所述扩散板覆盖至少一个所述灯板上的至少一列发光二极管，所述灯板上的至少部分发光二极管未被覆盖。
  2. 根据权利要求1所述的背光模组，其中，所述扩散板同时覆盖在所述缝隙两边的所述灯板，且仅覆盖在所述灯板上靠近所述缝隙的一列所述发光二极管。
  3. 根据权利要求1所述的背光模组，其中，所述扩散板与被所述扩散板覆盖的发光二极管对应的位置上设置有扩散腔，所述扩散腔的内壁与所述发光二极管之间设置有安全距离。
  4. 根据权利要求3所述的背光模组，其中，所述扩散腔的形状为半球形。
  5. 根据权利要求3所述的背光模组，其中，所述背光模组还包括至少两个第一反射片，所述第一反射片设置在与所述缝隙平行的所述扩散板的侧壁上。
  6. 根据权利要求3所述的背光模组，其中，所述扩散板远离所述灯板的一侧为第一表面，靠近所述灯板的一侧为第二表面，所述第一表面和所述第二表面相对设置，所述第一表面与所述缝隙对应位置处朝向所述第二表面凹陷形成弧形；
    其中，所述安全距离的范围为0.1mm-0.2mm。
  7. 根据权利要求1所述的背光模组，其中，被所述扩散板覆盖的一列发光二极管相邻的两个发光二极管之间的间距，小于所述灯板上未被所述扩散板覆盖的一列发光二极管相邻的两个发光二极管之间的间距。
  8. 根据权利要求1所述的背光模组，其中，所述背光模组还包括第二反射片，所述扩散板远离所述灯板的一侧为第一表面，靠近所述灯板的一侧为第二表面，所述第一表面和所述第二表面相对设置，所述第二反射片的反射面贴合在所述第二表面上，且所述第二反射片覆盖所述缝隙。
  9. 根据权利要求1所述的背光模组，其中，所述灯板包括主体部和支撑部，所述支撑部设置在所述主体部靠近所述缝隙的一侧；
    所述扩散板覆盖所述缝隙，所述扩散板远离所述缝隙的一侧为第一表面，靠近所述缝隙的一侧为第二表面，所述第一表面与所述支撑部抵接，所述第二表面与所述灯板的出光面平齐，被所述扩散板覆盖的发光二极管位于所述支撑部与所述扩散板之间。
  10. 根据权利要求1所述的背光模组，其中，所述扩散板与相邻所述灯板中的其中一个灯板固定连接，且所述扩散板与相邻所述灯板中的另一个所述灯板活动连接。
  11. 根据权利要求10所述的背光模组，其中，扩散板上设置通孔，所述灯板上的支撑柱与所述通孔固定连接。
  12. 根据权利要求11所述的背光模组，其中，所述扩散板的厚度与所述支撑柱的高度相同。
  13. 根据权利要求1所述的背光模组，其中，被所述扩散板覆盖的发光二极管，亮度可调节。
  14. 根据权利要求1所述的背光模组，其中，所述缝隙处设置有多条扩散板，多条所述扩散板一体成型设置。
  15. 根据权利要求1所述的背光模组，其中，所述灯板上设置有n列发光二极管，所述扩散板覆盖相邻的两个所述灯板中的任一灯板上的m列发光二极管；或所述灯板上设置有n行发光二极管，所述扩散板覆盖相邻的两个所述灯板中的任一灯板上的m行发光二极管；其中1≤m＜n/2。
  16. 根据权利要求1所述的背光模组，其中，所述扩散板包括水平部和竖直部，所述水平部相对所述灯板平行，所述竖直部相对所述水平部垂直，且所述竖直部设置在所述缝隙处，一端与所述水平部连接，另一端与背板固定连接。
  17. 根据权利要求1所述的背光模组，其中，所述灯板靠近所述缝隙的一侧上设置有一斜面和一侧壁，所述灯板的出光面为灯板的上表面，所述灯板的上表面、斜面、侧壁和所述灯板的下表面依次连接。
  18. 根据权利要求17所述的背光模组，其中，所述斜面上设置有发光二极管。
  19. 一种背光模组，包括拼接灯板，所述拼接灯板包括多个灯板，多个所述灯板拼接形成所述拼接灯板，相邻的所述灯板之间具有缝隙，所述背光模组还包括扩散板，所述扩散板设置在与所述缝隙对应的位置，且所述扩散板覆盖至少一个所述灯板上的至少一列发光二极管，所述灯板上的至少部分发光二极管未被覆盖；
    所述扩散板同时覆盖所述缝隙两边的两个所述灯板上的靠近所述缝隙的一列所述发光二极管；
    所述扩散板与被所述扩散板覆盖的发光二极管对应的位置上设置有扩散腔，所述扩散腔的内壁与所述发光二极管之间设置有安全距离，所述扩散腔的形状为半球形；
    所述背光模组还包括至少两个第一反射片，所述第一反射片设置在与所述缝隙平行的所述扩散板的侧壁上；
    被所述扩散板覆盖的一列发光二极管相邻的两个发光二极管之间的间距，小于所述灯板上未被所述扩散板覆盖的一列发光二极管相邻的两个发光二极管之间的间距；
    所述扩散板远离所述灯板的一侧为第一表面，靠近所述灯板的一侧为第二表面，所述第一表面和所述第二表面相对设置，所述第一表面与所述缝隙对应位置处朝向所述第二表面凹陷形成弧形；
    所述灯板包括主体部和支撑部，所述支撑部设置在所述主体部靠近所述缝隙的一侧；
    所述背光模组还包括第二反射片，所述第二反射片的反射面贴合在所述第二表面上，且所述第二反射片覆盖所述缝隙；
    所述扩散板覆盖所述缝隙，所述扩散板远离所述缝隙的一侧为第一表面，靠近所述缝隙的一侧为第二表面，所述第一表面与所述支撑部抵接，所述第二表面与所述灯板的出光面平齐，被所述扩散板覆盖的发光二极管位于所述支撑部与所述扩散板之间。
  20. 一种显示装置，所述显示装置包括显示面板以及背光模组，所述背光模组与所述显示面板对应设置，所述背光模组为所述显示面板提供背光源；
    其中，背光模组包括拼接灯板，所述拼接灯板包括多个灯板，多个所述灯板拼接形成所述拼接灯板，相邻的所述灯板之间具有缝隙，所述背光模组还包括扩散板，所述扩散板设置在与所述缝隙对应的位置，且所述扩散板覆盖至少一个所述灯板上的至少一列发光二极管，所述灯板上的至少部分发光二极管未被覆盖。
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