WO2020015263A1 - 直下式背光模组、液晶显示屏及终端设备 - Google Patents

直下式背光模组、液晶显示屏及终端设备 Download PDF

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Publication number
WO2020015263A1
WO2020015263A1 PCT/CN2018/115966 CN2018115966W WO2020015263A1 WO 2020015263 A1 WO2020015263 A1 WO 2020015263A1 CN 2018115966 W CN2018115966 W CN 2018115966W WO 2020015263 A1 WO2020015263 A1 WO 2020015263A1
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Prior art keywords
light source
backlight module
type backlight
support
module according
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PCT/CN2018/115966
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English (en)
French (fr)
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童咏霖
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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 WO2020015263A1 publication Critical patent/WO2020015263A1/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
    • G02F1/133602—Direct backlight
    • G02F1/133608—Direct backlight including particular frames or supporting means
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members

Definitions

  • the present application relates to the technical field of display devices, for example, a direct-type backlight module and a liquid crystal display and a terminal device including the direct-type backlight module.
  • LED backlight displays have also been widely used.
  • the LED backlight displays on the market are mainly divided into two types: side-entry type and direct-type according to the light entering method.
  • the side-entry type is to install the LED string as a backlight module around the LCD screen
  • the direct type is to install the LED string as the backlight module on the front and back of the LCD screen.
  • the direct-type backlight display Lower cost applications are more widespread.
  • direct-type displays generally require multiple support columns to support the diffusion plate, and the diffusion plate is fixed on the same horizontal plane.
  • the common support pillars are made of polycarbonate (PC) and polymethylmethacrylate (PMMA), which are generally transparent or white and have different shapes, but no matter what kind of support pillar there is, Disadvantages, shadows are easily generated at the support column, especially when the diameter of the direct-type backlight module is smaller, the shadow of the support column will be more obvious. At this time, more films are needed for shielding, which will increase the cost of the backlight module. .
  • the embodiments of the present application provide a direct type backlight module, a liquid crystal display screen and a terminal device, which can prevent the phenomenon of shadow of a support column at a low cost, and improve the backlight effect and display effect.
  • a direct-lit backlight module including: a bottom frame; a first light source disposed on the bottom frame; a diffusion plate disposed above the first light source; and a plurality of support columns disposed on On the bottom frame, the support column includes a top for abutting the diffusion plate and a bottom for abutting the bottom frame;
  • the second light source is disposed on the support pillar and located at a position other than the top of the support pillar.
  • the second light source is disposed at the bottom of the support pillar.
  • At least one receiving groove for receiving the second light source is provided at the bottom of the support post.
  • a side wall is provided between the top and the bottom of the support post, and the second light source is disposed on the side wall.
  • At least one receiving groove for receiving the second light source is defined in the side wall of the support post.
  • the second light source is connected in series with the first light source, and the two are connected to a storage power source or an external power source through a wire.
  • the second light source is a light emitting diode (LED) lamp.
  • LED light emitting diode
  • the support pillar is a tapered structure, and the top and bottom of the support pillar are a small end and a large end of the tapered structure, respectively.
  • a liquid crystal display which includes the direct-type backlight module described above.
  • a terminal device including the direct-type backlight module described above.
  • the beneficial effects of the embodiments of the present application are: by arranging a light source on the support post, the light emitted by the light source can be used to eliminate the shadow at the contact position between the support post and the diffuser plate, thereby improving the backlight effect and display effect.
  • FIG. 1 is a schematic structural diagram of a direct type backlight module according to an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of a direct type backlight module according to another embodiment of the present application.
  • connection should be understood in a broad sense unless explicitly stated and limited otherwise.
  • they may be fixed connections, detachable connections, or integrated ; It can be mechanical or electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction between two elements.
  • the specific meanings of the above terms in this application can be understood in specific situations.
  • the "first" or “under” of the second feature may include the first and second features in direct contact, and may also include the first and second features. Not directly, but through another characteristic contact between them.
  • the first feature is “above”, “above”, and “above” the second feature, including that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature is higher in level than the second feature.
  • the first feature is “below”, “below”, and “below” of the second feature, including the fact that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature is less horizontal than the second feature.
  • the present application provides a direct type backlight module including a bottom frame 1, a first light source 2 disposed on the bottom frame 1, a diffusion plate 3 disposed above the first light source 2, and a plurality of settings.
  • Each support pillar 4 includes a top 41 for abutting the diffuser plate 3 and a bottom 42 for abutting the bottom frame 1 on the bottom frame 1. A position of the top portion 41 is provided with the second light source 5.
  • the light emitted by the light source can be used to eliminate the shadow at the contact position between the support post 4 and the diffuser plate 3, thereby improving the backlight effect and the display effect.
  • the first light source 2 is an LED.
  • the first light source 2 is a bat-scattered LED.
  • the second light source 5 is disposed on the bottom 42 of the support post 4.
  • the second light source 5 provided at the bottom 42 is opposite to the diffuser plate 3.
  • the second light source 5 emits light
  • most of the light source can directly reach the contact position between the support column 4 and the diffuser plate 3, thereby eliminating the shadow at this position and avoiding
  • the arrangement of the support pillars 4 causes shadows on the diffuser plate 3 to affect the backlight effect and the display effect.
  • At least one accommodating groove 43 for accommodating the second light source 5 is defined in the bottom 42 of the support post 4.
  • the installation of the second light source 5 can be facilitated, and at the same time, the accuracy of the worker when installing the second light source 5 can be improved.
  • a side wall is disposed between the top 41 and the bottom 42 of the support post 4, and the second light source 5 is disposed on the side wall.
  • At least one receiving groove 43 for receiving the second light source 5 is defined on a side wall of the support post 4.
  • the second light source 5 is not limited to being provided only on the bottom 42 or the side wall of the support post 4, and the second light source 5 may also be provided on both the bottom 42 and the side wall.
  • the support post 4 Since the support post 4 is generally made of a transparent or white light-transmitting material, the support post 4 has a certain light blocking property. The light emitted by the first light source 2 will be blocked by the support post 4, and the top 41 of the support post 4 and Shadows are formed between the diffuser plates 3, affecting the backlight effect and the display effect.
  • a second light source 5 is provided in a place other than the top 41. The light emitted by the second light source 5 can effectively eliminate the shadow between the top 41 of the support column 4 and the diffuser plate 3, and can effectively enhance the uniformity of the backlight and display. effect.
  • the second light source 5 and the first light source 2 are connected in series, and the two are connected to a storage power source or an external power source through a wire.
  • the second light source 5 By connecting the first light source 2 and the second light source 5 in series, the second light source 5 emits light only when the first light source 2 is operating, thereby avoiding waste of power, and at the same time, it can prevent the second light source 5 from remaining when the first light source 2 has a small brightness In the bright state, bright spots are formed to affect the display effect.
  • the second light source 5 is an LED lamp bead.
  • the light emitted by the LED lamp beads has better divergence, which can prevent the setting of the second light source 5 from affecting the display effect of the backlight module.
  • the support post 4 has a tapered structure, and the top 41 and the bottom 42 of the support post 4 are the small and large ends of the tapered structure, respectively.
  • the supporting post 4 is made of a light-transmitting material.
  • the supporting post 4 is made of PC or PMMA.
  • the support column 4 is conical, which can reduce the contact area with the diffusion plate 3 on the premise of ensuring effective support for the diffusion plate 3, and further reduce the position of the connection between the support column 4 and the diffusion plate 3.
  • the shadow avoids affecting the diffusion effect of the diffusion plate 3, and the diameter of the support pillar 4 is directly proportional to the light transmittance of the support pillar 4. That is, the larger the diameter of the support post 4 is, the higher the light transmittance of the support post 4 needs to be selected.
  • the supporting column 4 is a prism structure, and the rest of the structure is the same as that in the above embodiment, and details are not described herein again.
  • the backlight module described in this application further includes a reflective sheet and an optical film, wherein the reflective sheet is disposed between the light source and the bottom frame 1, and the optical film is disposed above the diffusion plate 3.
  • a liquid crystal display which adopts the direct type backlight module described above.
  • the direct type backlight module described above.
  • a terminal device which adopts the direct type backlight module described above.
  • the direct type backlight module described above.

Abstract

本申请公开一种直下式背光模组、液晶显示屏及终端设备，直下式背光模组具体包括底框、第一光源、扩散板以及多个支撑柱，第一光源设置于底框上，扩散板设置于第一光源的上方，多个支撑柱设置于底框与扩散板之间，每个支撑柱均包括用于抵接扩散板的顶部和用于抵接底框的底部，在支撑柱的非顶部位置设置第二光源。

Description

直下式背光模组、液晶显示屏及终端设备
本申请要求在2018年07月18日提交中国专利局、申请号为201821145212.9的中国专利申请的优先权，该申请的全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示设备技术领域，例如涉及一种直下式背光模组及包含该直下式背光模组的液晶显示屏和终端设备。
背景技术
传统技术中，液晶显示器由于具有电磁辐射低、功耗低、发热量少、轻薄等特点，已经成为市面的主流显示器，发光二极管(Light-Emitting Diode，LED)背光显示器也获得广泛的应用。而目前市面上的LED背光显示器根据入光方式主要分为侧入式和直下式两种。其中，侧入式是将作为背光模组的LED灯串安装在液晶屏的四周，而直下式是将作为背光模组的LED灯串安装在液晶屏的正背面，相对来说直下式背光显示器成本较低应用更广泛。
目前，直下式显示器为了实现良好的背光效果和结构的稳定性，一般都需要采用多个支撑柱来支撑扩散板，将扩散板固定在同一个水平面上。其中，常见的支撑柱有聚碳酸酯(Polycarbonate，PC)和聚甲基丙烯酸甲酯(Polymethyl Methacrylate，PMMA)材质，一般为透明或者白色，形状不一，但不论什么材质的支撑柱均有个缺点，支撑柱处容易产生阴影，特别是当直下式背光模组的直径越小时，支撑柱的阴影会更加明显，此时需要更多的膜片来做遮蔽，这样会增加背光模组的成本。
发明内容
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
本申请实施例提供一种直下式背光模组、液晶显示屏及终端设备，能够在低成本的情况下，防止出现支撑柱阴影的现象，提高背光效果和显示效果。
本申请实施例采用以下技术方案：
第一方面，提供一种直下式背光模组，包括：底框；第一光源，设置于所述底框上；扩散板，设置于所述第一光源的上方；多个支撑柱，设置于所述底框上，所述支撑柱包括用于抵接所述扩散板的顶部和用于抵接所述底框的底部；
第二光源，设置在所述支撑柱上并位于所述支撑柱的非顶部的位置。
在一实施例中，所述第二光源设置在所述支撑柱的底部。
在一实施例中，在所述支撑柱的底部开设有至少一个用于容纳所述第二光源的容纳槽。
在一实施例中，所述支撑柱的顶部和底部之间设置侧壁，所述第二光源设置在所述侧壁上。
在一实施例中，在所述支撑柱的所述侧壁开设有至少一个用于容纳所述第二光源的容纳槽。
在一实施例中，所述第二光源与所述第一光源串联，且二者通过导线与储存电源或外部电源连接。
在一实施例中，所述第二光源为发光二极管LED灯珠。
在一实施例中，所述支撑柱呈锥形结构，所述支撑柱的顶部和底部分别为所述锥形结构的小端和大端。
第二方面，提供一种液晶显示屏，包括上述的直下式背光模组。
第三方面，提供一种终端设备，包括上述的直下式背光模组。
本申请实施例的有益效果为：通过在支撑柱上设置光源，可利用光源散发的光消除支撑柱与扩散板接触位置处的阴影，提高背光效果和显示效果。在阅读并理解了附图和详细描述后，可以明白其他方面。
附图说明
下面根据附图和实施例对本申请作进一步详细说明。
图1为本申请一实施例所述的直下式背光模组的结构示意图。
图2为本申请另一实施例所述的直下式背光模组的结构示意图。
图中：
1、底框；2、第一光源；3、扩散板；4、支撑柱；41、顶部；42、底部；43、容纳槽；5、第二光源。
具体实施方式
下面将结合附图对本申请实施例的技术方案作进一步的详细描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
在本申请的描述中，除非另有明确的规定和限定，术语“相连”、“连接”、“固定”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正下方和斜下方，或仅仅表示第一特征水平高度小于第二特征。
如图1所示，本申请提供一种直下式背光模组，包括底框1、设置于底框1上的第一光源2、设置于第一光源2的上方的扩散板3和多个设置于底框1上的支撑柱4，每个支撑柱4包括用于抵接扩散板3的顶部41和用于抵接底框1的底部42，在支撑柱4上并位于支撑柱4的非顶部41的位置设置有第二光源5。
通过在支撑柱4上设置光源，可利用光源散发的光消除支撑柱4与扩散板3接触位置处的阴影，提高背光效果和显示效果。
在一实施例中，第一光源2为LED。
在一实施例中，第一光源2为蝙蝠散射光型LED。
在一实施例中，第二光源5设置在支撑柱4的底部42。
底部42设置的第二光源5与扩散板3正对，当第二光源5发光时，光源绝大部分可直接到达支撑柱4与扩散板3的接触位置，进而消除此位置处的阴影，避免支撑柱4的设置造成在扩散板3上形成阴影影响背光效果和显示效果。
具体的，在支撑柱4的底部42开设有至少一个用于容纳第二光源5的容纳槽43。
通过在支撑柱4的底部42设置容纳槽43，可便于第二光源5的安装，同时可提高工人在安装第二光源5时的精准性。
如图2所示，在另一个具体的实施例中，支撑柱4的顶部41和底部42之间设置侧壁，第二光源5设置在侧壁上。
在一实施例中，在支撑柱4的侧壁开设有至少一个用于容纳第二光源5的容纳槽43。
当然，第二光源5不限于仅设置在支撑柱4的底部42或侧壁，还可以在底部42和侧壁上均设置第二光源5。
由于支撑柱4一般采用透明或者白色的透光材料制成，使得支撑柱4具有一定都阻光性，第一光源2发出的光将会被支撑柱4阻挡，在支撑柱4的顶部41与扩散板3之间形成阴影，影响背光效果和显示效果。在除顶部41以外的地方设置第二光源5，第二光源5散发的光可对支撑柱4的顶部41与扩散板3之间的阴影进行有效消除，可有效的增强背光的均匀性和显示效果。
在一实施例中，第二光源5与第一光源2串联，且二者通过导线与储存电源或外部电源连接。
通过将第一光源2和第二光源5串联，使得第二光源5只有在第一光源2工作的时候发光，避免浪费电能，同时能够避免第二光源5在第一光源2的亮度较小时仍然处于高亮状态，形成亮斑影响显示效果。
在一实施例中，第二光源5为LED灯珠。LED灯珠发出的光线的发散性更好，可避免第二光源5的设置影响背光模组的显示效果。
在一个具体的实施例中，支撑柱4呈锥形结构，支撑柱4的顶部41和底部42分别为锥形结构的小端和大端。
在一实施例中，支撑柱4采用透光材料制成。
在一实施例中，支撑柱4采用PC或PMMA制成。
在其他实施例中，支撑柱4呈圆锥形，可在保证对扩散板3的有效支撑的前提下可减少与扩散板3的接触面积，进一步减少支撑柱4与扩散板3的连接位置处的阴影，避免影响扩散板3的扩散效果，且支撑柱4的直径与支撑柱4的透光率成正比。即支撑柱4的直径越大，支撑柱4的透光率需要选择得更高。
在另一实施例中，支撑柱4为棱柱结构，其余结构与上述实施例中一致，在此不再赘述。
在一实施例中，本申请所述的背光模组还包括反射片和光学膜片，其中，反射片设置于光源和底框1之间，光学膜片设置于扩散板3的上方。
第二方面，提供一种液晶显示屏，其采用上述的直下式背光模组。直下式背光模组的具体结构参照上述实施例。
第三方面，提供一种终端设备，其采用上述的直下式背光模组。直下式背光模组的具体结构参照上述实施例。
于本文的描述中，需要理解的是，术语“上”、“下”、“右”、等方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述和简化操作，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。此外，术语“第一”、“第二”仅仅用于在描述上加以区分，并没有特殊的含义。
在本说明书的描述中，参考术语“一实施例”、“示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。
此外，应当理解，虽然本说明书按照实施方式加以描述，但并非每个实施方式仅包含一个独立的技术方案，说明书的这种叙述方式仅仅是为清楚器件，本领域技术人员应当将说明书作为一个整体，多个实施例中的技术方案也可以适当组合，形成本领域技术人员可以理解的其他实施方式。

Claims (10)

  1. 一种直下式背光模组，包括：
    底框；
    第一光源，设置于所述底框上；
    扩散板，设置于所述第一光源的上方；
    多个支撑柱，设置于所述底框上，所述支撑柱包括用于抵接所述扩散板的顶部和用于抵接所述底框的底部；
    第二光源，设置在所述支撑柱上并位于所述支撑柱的非顶部的位置。
  2. 根据权利要求1所述的直下式背光模组，其中，所述第二光源设置在所述支撑柱的底部。
  3. 根据权利要求2所述的直下式背光模组，其中，在所述支撑柱的底部开设有至少一个用于容纳所述第二光源的容纳槽。
  4. 根据权利要求1所述的直下式背光模组，其中，所述支撑柱的顶部和底部之间设置侧壁，所述第二光源设置在所述侧壁上。
  5. 根据权利要求4所述的直下式背光模组，其中，在所述支撑柱的所述侧壁开设有至少一个用于容纳所述第二光源的容纳槽。
  6. 根据权利要求1所述的直下式背光模组，其中，所述第二光源与所述第一光源串联，且二者通过导线与储存电源或外部电源连接。
  7. 根据权利要求1至6任一项所述的直下式背光模组，其中，所述第二光源为发光二极管LED灯珠。
  8. 根据权利要求1至6任一项所述的直下式背光模组，其中，所述支撑柱呈锥形结构，所述支撑柱的顶部和底部分别为所述锥形结构的小端和大端。
  9. 一种液晶显示屏，包括权利要求1至8任一项所述的直下式背光模组。
  10. 一种终端设备，包括权利要求1至8任一项所述的直下式背光模组。
PCT/CN2018/115966 2018-07-18 2018-11-16 直下式背光模组、液晶显示屏及终端设备 WO2020015263A1 (zh)

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