WO2021103590A1 - 一种背光模组及显示装置 - Google Patents

一种背光模组及显示装置 Download PDF

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Publication number
WO2021103590A1
WO2021103590A1 PCT/CN2020/102747 CN2020102747W WO2021103590A1 WO 2021103590 A1 WO2021103590 A1 WO 2021103590A1 CN 2020102747 W CN2020102747 W CN 2020102747W WO 2021103590 A1 WO2021103590 A1 WO 2021103590A1
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backlight module
optical
back plate
soft film
film
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PCT/CN2020/102747
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English (en)
French (fr)
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王本贵
张小明
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广州视源电子科技股份有限公司
广州视睿电子科技有限公司
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Publication of WO2021103590A1 publication Critical patent/WO2021103590A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices

Definitions

  • This application relates to the technical field of display devices, and in particular to a backlight module and a display device.
  • the backlight module in the existing solution includes a light emitting device, a reflector, a diffuser, an optical film, a middle frame, a front frame, and a back plate.
  • the light emitting device is arranged at the bottom of the back plate, and the front frame and the back plate They are respectively connected with the middle frame, and an optical film, a diffusion plate and a reflection sheet are arranged between the middle frame and the back plate.
  • the optical film is used for uniform light, and at the same time, a diffuser for astigmatism, uniformity, and support for the optical film is added.
  • the optical film plus a resin diffuser has a heavy weight and is easy to be in the middle.
  • the depression occurs, which affects the normal operation of the backlight module.
  • supporting pillars or other supporting structures are usually arranged in the back plate to avoid depressions in the middle of the diffuser plate and the optical film.
  • supporting pillars or other supporting structures are arranged in the backplane, resulting in a more complicated structure, and at the same time increasing the weight and thickness of the backlight module to a certain extent.
  • the purpose of the present application is to provide a backlight module which has the advantages of simple structure, good stability, light weight, low cost and high production efficiency.
  • a backlight module includes a back plate, a light-emitting device and an optical film; the light-emitting device is arranged on the back plate; the edge of the back plate is provided with rivet posts, and the optical film includes an optical soft film and an optical film.
  • a fixing strip outside the edge of the optical soft film, the fixing strip is fixedly connected to the edge of the optical soft film, and is provided with a hanging ear hole, and the rivet post is inserted into the hanging ear hole.
  • the backlight module provided by the embodiments of the present application adopts an optical soft film as the astigmatism and homogenization structure of the backlight module. It is lighter in weight, can reduce its own weight, and reduce the weight of the whole machine while avoiding the film to a certain extent.
  • the middle part of the film is sunken due to gravity.
  • the optical soft film is elastic, it is an elastic film.
  • a fixing strip is set outside its edge, and the lug holes and rivet posts are used to fix it.
  • the optical film is Fixed with the rivet post, the middle part of the optical soft film is stretched and will not be dented.
  • the structure of the support post and the diffuser is omitted, and the weight of the whole machine is further reduced.
  • the structure is simple and reliable, the cost is low, and it is easy to assemble. high productivity.
  • the optical soft film is a PVC soft film
  • the fixing strip is a PVC adhesive strip.
  • the PVC rubber strip has a higher hardness than the PVC soft film, and can avoid the problem that the ear holes are deformed due to the stretching action, and then fall off from the rivet post.
  • optical soft film and the fixing strip are bonded and fixed, and the bonding and fixing effect is good.
  • the optical soft film and the fixing strip are fixed by high-frequency welding.
  • the fixing method of high frequency welding is to use high frequency electromagnetic field to make the internal molecules of the PVC material violently collide with each other and generate high temperature to achieve the purpose of welding and welding. It can rearrange and combine the molecular structure of the soft film body and the fixed strip to form a whole material. , It can improve the strength of the material itself, the welding is firm and the surface effect of the joint is good, and it can effectively avoid the problem of fracture from the bond.
  • the back plate includes a back plate body and a back plate side wall, and the rivet posts are arranged at the edge of the back plate body.
  • the four sides of the back plate body are provided with rivet posts; the four sides of the optical soft film are all fixedly connected with fixing bars to tighten and fix the four sides of the optical soft film, so that the optical soft film
  • the fixation is firmer and the flatness is better, and the astigmatism and uniformity effects are better.
  • the fixing strip is arranged around the outer circumference of the optical soft film.
  • each side of the back plate is provided with a plurality of rivet posts, and each fixing bar is correspondingly provided with a plurality of ear holes, so that the fixing is more firm.
  • a reflective sheet is also arranged between the light-emitting device and the back plate to reflect the light generated by the light-emitting device upward or in a desired direction, so as to improve the light utilization efficiency.
  • the middle frame also includes a middle frame, which is arranged above the edge of the back plate and the optical soft film;
  • the middle frame includes a middle frame body, a first extension part and a first extension formed on both sides of the inner and outer sides of the top of the middle frame body.
  • Two extensions the first extension is in contact with the top of the rivet post, the second extension is in contact with the top of the side wall of the back plate, and the first extension is opposite to the rivet post on the back plate body Cover, and limit the optical soft film through its cooperation with the rivet post, so as to prevent the optical soft film from falling off the rivet post, and further enhance the structural stability;
  • the second extension and The side walls of the back plate cooperate to protect the internal structure of the backlight module.
  • an embodiment of the present application also provides a display device, which includes the above-mentioned backlight module.
  • the backlight module provided by the embodiments of the present application adopts an optical soft film as the astigmatism and homogenization structure of the backlight module. It is lighter in weight, can reduce its own weight, and reduce the weight of the whole machine while avoiding the film to a certain extent.
  • the central part of the film is concave due to gravity; in addition, it is elastic and has a certain stretching ability, and is further combined with the setting of the fixing strip, so that the length and width of the optical soft film can be adjusted to tighten the whole, thereby eliminating the need for support pillars and diffusion
  • the structure of the board further reduces the weight of the whole machine; the middle frame is set to further cooperate with the rivet column to limit the optical soft film, and the coordination of the middle frame and the side wall of the back plate can protect the backlight module, and the structure is simple and reliable Strong, beautiful appearance, low cost, easy to assemble, and high production efficiency.
  • FIG. 1 is a cross-sectional view of the structure of the backlight module according to Embodiment 1 of the application.
  • FIG. 1 is a cross-sectional view of the backlight module structure according to an embodiment of the application.
  • the embodiment of the present application provides a backlight module, which includes a back plate 10, a light emitting device 20, a middle frame 30, and an optical film 40.
  • the back plate 10 includes a back plate body 12 and a back plate side wall 14 for supporting internal devices, sealing the backlight module, and providing necessary protection; the light emitting device 20 is arranged on the back plate body 12 to provide a light source for the backlight module .
  • a number of rivet posts 16 are provided at the edge of the back plate body 12; the optical film 40 includes an optical soft film 42 and a fixing strip 44 located outside the edge of the optical soft film 42.
  • the optical soft film 42 is elastic , Can be stretched PVC film
  • the fixing strip 44 is a PVC rubber strip
  • the fixing strip 44 is provided with a hanging ear hole 46, the rivet column 16 is inserted into the hanging ear hole 46, and then the optical film 40 is fixed on the back plate 10 to achieve the purpose of fixing it.
  • the fixing strip 44 has a higher hardness than the optical soft film 42. This arrangement can prevent the ear hole 16 from being deformed due to the stretching action, which may cause the optical film 40 to fall off the rivet post 16.
  • the fixing strip 44 and the optical soft film 42 are fixed by bonding.
  • high-frequency welding is used for fixing, which uses high-frequency electromagnetic fields to cause the internal molecules of the PVC material to violently collide with each other. Generate high temperature to achieve the purpose of welding and welding.
  • the high frequency can re-arrange and combine the molecular structure of the connection between the optical soft film 42 and the fixing bar 44 to form a whole material, which can improve the strength of the material itself, the welding is firm and the surface effect of the connection is good, which can be effective Avoid the problem of breakage from the bond.
  • rivet posts 16 are provided on the four side edges of the back plate body 12, and fixing bars 44 are fixedly connected around the optical soft film 42.
  • the fixing bars surround the outer periphery of the optical soft film.
  • a plurality of rivet posts 16 are provided on each side of the back plate body 12, and a plurality of lug holes 46 are provided on each fixing strip 44 to enhance the structural stability of the insertion and fixing of the optical film 40 , And the four sides of the optical film 40 are tightened and fixed, so that the optical film 40 is fixed more firmly, and the flatness is better, and the astigmatism and uniform light effects are better.
  • the middle frame 30 includes a middle frame body 32, a first extension portion 34 and a second extension portion 36 formed by extending the top of the middle frame body 32 to the inner and outer sides respectively;
  • the middle frame body 32 is a frame-shaped structure, which is arranged on the back
  • the edge of the board body 12 is located on the outer side of the optical film and the rivet column, which supports the liquid crystal screen after the backlight module composes the display device;
  • the first extension portion 34 extends toward the inner side of the back board body 12, which is connected with the rivet
  • the top of the column 16 touches and covers it;
  • the first extension part 34 cooperates with the rivet column 16 to limit the position of the optical film 40 to prevent the optical film 40 from falling off the rivet column 16 and further enhance the stability of the structure Sex.
  • the second extension portion 36 extends toward the back plate side wall 14 and contacts the top of the back plate side wall 14 to cooperate with the back plate side wall 14 to protect the internal structure of the backlight module and prevent foreign objects from entering.
  • a reflective sheet 50 is provided between the light-emitting device 20 and the back plate 10, which is used to reflect the light generated by the light-emitting device upward or in a desired direction to improve the light. Utilization rate.
  • the backlight module provided by the embodiments of the present application uses an optical soft film as the astigmatism and homogenization structure of the backlight module. It is lighter in weight, can reduce its own weight, and reduce the weight of the whole machine while avoiding it to a certain extent.
  • the middle part of the diaphragm is sunken due to gravity; in addition, it is elastic and has a certain stretching ability, and is further combined with the setting of the fixing strip, so that the length and width of the optical soft film can be adjusted to tighten the whole, thereby eliminating the need for supporting columns
  • the structure of the diffuser plate further reduces the weight of the whole machine; the middle frame is set to further cooperate with the rivet column to limit the optical soft film, and the cooperation of the middle frame and the side wall of the back plate can protect the backlight module.
  • the structure is simple and It has strong reliability, high appearance, low cost, easy assembly and high production efficiency.
  • the display device of this embodiment includes the backlight module described in this application. Since the backlight module of the present application has the above advantages, the display device has the advantages of simple structure, strong reliability, beautiful appearance, light weight, low cost, and easy assembly.

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

Abstract

一种背光模组及显示装置，包括背板（10）、发光器件（20）以及光学膜片（40）；光学膜片（40）包括光学软膜（42）以及位于光学软膜（42）边缘外的固定条（44），固定条（44）与光学软膜（42）边缘固定连接，其开设有挂耳孔（46）；背板（10）边缘设置有铆柱（16），铆柱（16）插设于挂耳孔（46）。使用了光学软膜（42）以作为背光模组的散光及匀光结构，其重量较轻，能够减少自重，减轻整机重量；同时由于光学软膜（42）具有一定弹性，当光学膜片（40）与铆柱（16）固定时，光学软膜（42）的中部呈绷直状态而不会凹陷，省去了支撑柱以及扩散板的结构，有效减轻整机重量，结构简单且可靠性强，成本低，同时容易装配，生产效率高。

Description

一种背光模组及显示装置
本申请要求于2019年11月28日提交至中国国家知识产权局、申请号为201922101816.4、发明名称为“一种背光模组以及显示装置”的专利申请的优先权。
技术领域
本申请涉及显示装置技术领域，特别是涉及一种背光模组以及显示装置。
背景技术
现有方案中的背光模组包括发光器件、反射片、扩散板、光学膜片、中框、前框以及背板，所述发光器件设置于所述背板底部，所述前框和背板分别与中框连接，所述中框与背板之间设置有光学膜片、扩散板以及反射片。
所述光学膜片用于均匀光线，同时增设用于散光、匀光作用以及支撑光学膜片的扩散板，而光学膜片加上树脂类材质的扩散板，其重量较重，其容易在中部发生凹陷，对背光模组的正常工作造成影响。现有技术中通常采用在背板内设置支撑柱或其他支撑结构，以避免扩散板及光学膜片中部发生凹陷。但是在背板内设置支撑柱或其他支撑结构，导致结构较为复杂，同时在一定程度上增加了背光模组的重量及厚度。
发明内容
基于此，本申请的目的在于，提供一种背光模组，其具有结构简单且稳定性良好，重量轻，成本低以及生产效率高的优点。
一种背光模组，其包括背板、发光器件以及光学膜片；所述发光器件设置于背板上；所述背板的边缘设置有铆柱，所述光学膜片包括光学软膜以及位于光学软膜边缘外的固定条，所述固定条与所述光学软膜边缘固定连接，其开设有挂耳孔，所述铆柱插设于所述挂耳孔。
本申请实施例所提供的背光模组，其通过优选光学软膜作为所述背光模组的散光及匀光结构，其重量较轻，能够减少自重，减轻整机重量同时在一定程度上避免膜片中部由于重力作用发生凹陷的问题，另外由于光学软膜具有弹性，是一种弹性膜片，同时在其边缘外设置固定条，利用其开设的挂耳孔与铆柱进行固定，当光学膜片与铆柱固定，光学软膜的中部呈绷直状态而不会凹陷，省去了支撑柱以及扩散板的结构，进一步减轻整机重量，结构简单且可靠性强，成本低，同时容易装配，生产效率高。
进一步地，所述光学软膜是PVC软膜，所述固定条是PVC胶条。所述PVC胶条硬度较 PVC软膜高，能够避免挂耳孔由于拉伸作用而发生变形，进而从铆柱发生脱落的问题。
进一步地，所述光学软膜和所述固定条为粘结固定，粘结固定效果好。
进一步地，所述光学软膜和所述固定条为高周波熔接固定。高周波熔接的固定方式为利用高频电磁场使PVC物料内部分子间互相激烈碰撞进而产生高温以达到焊接和熔接的目的，其能使软膜本体与固定条连接处的分子结构重新排列组合形成整体材料，能提高材料本身强度，熔接牢固且连接处表面效果好，能够有效避免从粘结处发生断裂的问题。
进一步地，所述背板包括背板本体和背板侧壁，所述铆柱设置于背板本体边缘。
进一步地，所述背板本体四侧边缘上均设置有铆柱；所述光学软膜四条侧边上均固定连接有固定条，以对光学软膜的四边进行绷紧固定，使光学软膜的固定更为牢固同时平整度更好，散光及匀光效果更佳。优选地，所述固定条围绕所述光学软膜的外周设置。
进一步地，所所述背板每条侧边上均设置有多个铆柱，每条固定条上均对应设置有多个挂耳孔，使固定更为牢固。
进一步地，所述发光器件与所述背板之间还设置有反射片，用以将所述发光器件所产生的光线向上或按照所需方向进行反射，以提高光利用率。
进一步地，还包括中框，其设置于所述背板和光学软膜边缘上方；所述中框包括中框本体、中框本体顶部内外两侧向外延伸所形成的第一延伸部和第二延伸部；所述第一延伸部与所述铆柱顶部相接触，所述第二延伸部与所述背板侧壁顶部相接触，所述第一延伸部对背板本体上的铆柱进行覆盖，并通过其与铆柱的配合，对所述光学软膜进行限位，以避免所述光学软膜从所述铆柱上脱落，进一步加强结构稳定性；所述第二延伸部与所述背板侧壁配合以对背光模组内部结构进行保护。
另外，本申请实施例还提供了一种显示装置，其包括以上所述的背光模组。
本申请实施例所提供的背光模组，其通过优选光学软膜作为所述背光模组的散光及匀光结构，其重量较轻，能够减少自重，减轻整机重量同时在一定程度上避免膜片中部由于重力作用发生凹陷的问题；另外具有弹性并具有一定的拉伸能力，并进一步结合固定条的设置，使得可以通过调节光学软膜的长宽绷紧整体，进而省去支撑柱以及扩散板的结构，进一步减轻整机重量；中框的设置进一步配合铆柱对光学软膜进行限位，同时中框与背板侧壁的配合能对背光模组起保护作用，结构简单且可靠性强，外形美观度高，成本低，容易装配，生产效率高。
为了更好地理解和实施，下面结合附图详细说明本申请。
附图说明
图1为本申请实施例1所述背光模组结构剖视图。
具体实施方式
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
实施例1
请参照图1，图1为本申请实施例所述背光模组结构剖视图。
本申请实施例提供了一种背光模组，其包括背板10、发光器件20、中框30以及光学膜片40。
背板10包括背板本体12以及背板侧壁14，用于支撑内部器件以及密封背光模组，并提供必要的防护；发光器件20设置于背板本体12上，用以为背光模组提供光源。
背板本体12的边缘处设置有若干铆柱16；光学膜片40包括光学软膜42以及位于光学软膜42边缘外的固定条44，作为一种优选实施方式，光学软膜42为具有弹性、能够进行拉伸的PVC软膜，固定条44为PVC胶条；所述固定条44上开设有挂耳孔46，所述铆柱16插设于挂耳孔46内，进而将所述光学膜片40固定于所述背板10上，实现对其进行固定的目的。所述固定条44硬度较光学软膜42高，此设置能够避免挂耳孔16由于拉伸作用而发生变形，进而导致光学膜片40从铆柱16上发生脱落的问题。所述固定条44与所述光学软膜42通过粘结的方式进行固定，作为一种优选的实施方式，为采用高周波熔接固定，其为利用高频电磁场使PVC物料内部分子间互相激烈碰撞进而产生高温以达到焊接和熔接的目的，高周波能使光学软膜42与固定条44连接处的分子结构重新排列组合形成整体材料，能提高材料本身强度，熔接牢固且连接处表面效果好，能够有效避免从粘结处发生断裂的问题。
作为一种优选实施方式，背板本体12四侧边缘上均设置有铆柱16，光学软膜42四周均固定连接有固定条44，优选地，所述固定条围绕所述光学软膜的外周设置，背板本体12每条侧边上均设置有多个铆柱16，每条固定条44上均相应设置有多个挂耳孔46，以加强对光学膜片40插设固定的结构稳定性，并对光学膜片40的四边进行绷紧固定，使光学膜片40的固定更为牢固同时平整度更好，散光及匀光效果更佳。
中框30包括中框本体32、中框本体32顶部向内外两侧分别延伸所形成的第一延伸部34 和第二延伸部36；所述中框本体32为框状结构，其设置于背板本体12的边缘且位于光学膜片及铆柱的外侧，其在背光模组组成显示装置后对液晶屏起支撑作用；第一延伸部34朝向背板本体12的内侧方向延伸，其与铆柱16顶部相接触，对其进行覆盖；通过第一延伸部34与铆柱16的配合，对光学膜片40进行限位，以避免光学膜片40从铆柱16上脱落，进一步加强结构稳定性。第二延伸部36朝向背板侧壁14方向延伸，并与背板侧壁14顶部相接触，与背板侧壁14配合以对背光模组内部结构进行保护，并防止外界杂物等进入。
作为一种优选实施方式，所述发光器件20与所述背板10之间设置有反光片50，其用以将所述发光器件所产生的光线向上或按照所需方向进行反射，以提高光利用率。
本申请实施例所提供的背光模组，其通过优选光学软膜以作为所述背光模组的散光及匀光结构，其重量较轻，能够减少自重，减轻整机重量同时在一定程度上避免膜片中部由于重力作用发生凹陷的问题；另外其具有弹性并具有一定的拉伸能力，并进一步结合固定条的设置，使得可以通过调节光学软膜的长宽绷紧整体，进而省去支撑柱以及扩散板的结构，进一步减轻整机重量；中框的设置进一步配合铆柱对光学软膜进行限位，同时中框与背板侧壁的配合能对背光模组起保护作用，结构简单且可靠性强，外形美观度高，成本低，容易装配，生产效率高。
实施例2
本实施例的显示装置，包括本申请所述的背光模组。由于本申请的背光模组具有上述优点，使得显示装置具有结构简单且可靠性强，外形美观度，重量轻成本低、容易装配等优点。
本申请并不局限于上述实施方式，如果对本申请的各种改动或变形不脱离本申请的精神和范围，倘若这些改动和变形属于本申请的权利要求和等同技术范围之内，则本申请也意图包含这些改动和变形。

Claims (10)

  1. 一种背光模组，其中：包括背板、发光器件以及光学膜片；所述发光器件设置于背板上；所述背板的边缘设置有铆柱，所述光学膜片包括光学软膜以及位于光学软膜边缘外的固定条，所述固定条与所述光学软膜边缘固定连接，其开设有挂耳孔，所述铆柱插设于所述挂耳孔。
  2. 根据权利要求1所述的背光模组，其中：所述光学软膜是PVC软膜，所述固定条是PVC胶条。
  3. 根据权利要求1所述的背光模组，其中：所述光学软膜和所述固定条为粘结固定。
  4. 根据权利要求3所述的背光模组，其中：所述光学软膜和所述固定条为高周波熔接固定。
  5. 根据权利要求1所述的背光模组，其中：所述背板包括背板本体和背板侧壁，所述铆柱设置于背板本体边缘。
  6. 根据权利要求5所述的背光模组，其中：所述背板本体四侧边缘上均设置有铆柱；所述光学软膜四条侧边上均固定连接有固定条。
  7. 根据权利要求6所述的背光模组，其中：所述背板每条侧边上均设置有多个铆柱，每条固定条上均对应设置有多个挂耳孔。
  8. 根据权利要求1所述的背光模组，其中：所述发光器件与所述背板之间还设置有反射片。
  9. 根据权利要求1所述的背光模组，其中：还包括中框，其设置于所述背板和光学软膜边缘上方；所述中框包括中框本体、中框本体顶部向内外两侧分别延伸所形成的第一延伸部和第二延伸部；所述第一延伸部与所述铆柱顶部相接触，所述第二延伸部与所述背板侧壁顶部相接触。
  10. 一种显示装置，其中：所述显示装置包括权利要求1-9任一所述的背光模组。
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