WO2020015341A1 - Direct-type backlight module and display - Google Patents

Direct-type backlight module and display Download PDF

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Publication number
WO2020015341A1
WO2020015341A1 PCT/CN2019/070568 CN2019070568W WO2020015341A1 WO 2020015341 A1 WO2020015341 A1 WO 2020015341A1 CN 2019070568 W CN2019070568 W CN 2019070568W WO 2020015341 A1 WO2020015341 A1 WO 2020015341A1
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Prior art keywords
backlight module
type backlight
light
plate
direct
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PCT/CN2019/070568
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French (fr)
Chinese (zh)
Inventor
刘欣
廖育海
余彦飞
尤君平
李坚
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深圳创维-Rgb电子有限公司
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Priority to CN201810778897.9 priority Critical
Priority to CN201810778897.9A priority patent/CN108644647B/en
Application filed by 深圳创维-Rgb电子有限公司 filed Critical 深圳创维-Rgb电子有限公司
Publication of WO2020015341A1 publication Critical patent/WO2020015341A1/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21SNON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • F21S2/005Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction of modular construction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V19/00Fastening of light sources or lamp holders
    • F21V19/001Fastening of light sources or lamp holders the light sources being semiconductors devices, e.g. LEDs
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V5/00Refractors for light sources
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21VFUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00Reflectors for light sources
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]

Abstract

A direct-type backlight module and a display. The direct-type backlight module comprises a annular light panel (1) and a conical support column (2); a plurality of light sources (11) are provided on the annular light panel (1); the conical support column is disposed above the annular light panel; the conical support column is a hollow structure which comprises an inner layer and an outer layer; a light source cavity is formed between the inner and outer layers; and a plurality of protrusions (21), which enables the light to exit in all directions in the plane uniformly from the surface of the outer layer of the conical support column, are provided on the inner surface of the inner layer. A light source assembly formed by the annular light panel provided with the conical support column can emit light in all directions in any plane uniformly, so that the problem of uneven visual effect and shadow of support are solved, and the production process and the module structure of a light panel are simplified.

Description

直下式背光模组及显示器Direct type backlight module and display
本公开要求在2018年07月16日提交中国专利局、申请号为201810778897.9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公开中。This disclosure claims priority from a Chinese patent application filed with the Chinese Patent Office on July 16, 2018, with application number 201810778897.9, the entire contents of which are incorporated herein by reference.
技术领域Technical field
本公开涉及显示设备技术领域,例如涉及一种直下式背光模组及显示器。The present disclosure relates to the technical field of display devices, for example, a direct type backlight module and a display.
背景技术Background technique
如图1所示,传统直下式背光模组中,发光二极管(Light Emitting Diode,LED)灯板和支架1’固定于背板2’的底部,反射片3’设置在背板2’内表面,扩散板4’和膜片5’置于背板2’的顶部平台并由支架1’支撑,LED6’外罩设有透镜7’,背板2’和扩散板4’之间形成混光腔体。由于透镜7’的技术和制程能力有限,光能无法按照理论设计精确分布、均匀出光,会在扩散板4’上形成明暗不均的区块化分布,如图2所示,主观视效上表现为常见的灯颗影、暗角8’、暗区9’、亮区10’等问题,光能利用率低、视效品质较差。传统直下式背光模组的设计又非常依赖于透镜7’,而透镜7’开发周期长、制造精度低,难以满足直下式背光的发展需求。As shown in FIG. 1, in a conventional direct type backlight module, a light emitting diode (LED) lamp plate and a bracket 1 ′ are fixed to the bottom of the back plate 2 ′, and a reflection sheet 3 ′ is provided on the inner surface of the back plate 2 ′. The diffuser 4 'and the diaphragm 5' are placed on the top platform of the back plate 2 'and supported by the bracket 1'. The LED 6 'cover is provided with a lens 7'. A light mixing cavity is formed between the back plate 2 'and the diffuser 4'. body. Due to the limited technology and process capability of lens 7 ', the light energy cannot be accurately distributed and uniformly emitted according to the theoretical design, and a uneven distribution of light and dark will be formed on the diffuser plate 4', as shown in Figure 2, subjective visual effects. It is manifested by common problems such as lamp shadows, vignetting angles 8 ', dark areas 9', and bright areas 10 ', which has low light energy utilization rate and poor visual quality. The design of the traditional direct type backlight module is very dependent on the lens 7 '. The lens 7' has a long development cycle and low manufacturing accuracy, which is difficult to meet the development needs of the direct type backlight.
另一方面,传统支架1’一般由聚甲基丙烯酸甲酯(poly(methyl methacrylate,PMMA)或聚苯乙烯(Polystyrene,PS)材质制成,如图3所示,LED6’的光能经透镜7’出射到达支架1’,部分被反射回腔体,部分被支架1’吸收,部分经支架1’折射后到达扩散板4’产生偏移,由于反射和吸收的存在,经过支架1’的光能会被削弱,再加上光偏移的存在,因此扩散板4’上会形成明暗不均的区域性光能分布,即支架暗影现象。随着直下式背光模组设计的日益轻薄化,混光距离H’变小,上述问题就愈发凸显。On the other hand, the conventional bracket 1 'is generally made of poly (methyl methylmethacrylate (PMMA) or polystyrene (PS). As shown in FIG. 3, the light energy of the LED 6' passes through the lens 7 'exited to the bracket 1', part of it was reflected back to the cavity, part of it was absorbed by the bracket 1 ', and part of it was refracted by the bracket 1' and reached the diffuser plate 4 '. Due to the existence of reflection and absorption, it passed through the bracket 1'. The light energy will be weakened, and coupled with the existence of the light shift, a regional light energy distribution with uneven brightness and darkness will be formed on the diffuser 4 ', that is, the shadow phenomenon of the bracket. With the design of the direct-type backlight module, it becomes thinner and lighter. As the light mixing distance H 'becomes smaller, the above problems become more prominent.
相关技术中的解决方案一般为使用多个扩散片、棱镜片等光学膜片进行亮度提升和遮蔽,才能呈现较均匀的视效,但成本高且效果差。The solutions in the related art generally use multiple optical films, such as diffusers and prism sheets, for brightness enhancement and shielding in order to present a more uniform visual effect, but the cost is high and the effect is poor.
发明内容Summary of the invention
本公开提出一种直下式背光模组,能够获得均匀的视效品质,且简化了模 组架构,降低生产成本。The present disclosure proposes a direct type backlight module, which can obtain uniform visual effect quality, simplifies the module structure, and reduces production costs.
本公开提供了一种直下式背光模组,包括:The present disclosure provides a direct type backlight module, including:
环形灯板,所述环形灯板上间隔设置有多个光源;A ring light plate, a plurality of light sources are arranged at intervals on the ring light plate;
锥形支撑柱,所述锥形支撑柱设置于所述环形灯板的上方,所述锥形支撑柱为中空结构,包括内层和外层,所述内层和所述外层之间形成光源腔,所述内层的内表面上凸设有多个凸起,所述多个凸起设置为使得多个光源发出的光从所述锥形支撑柱的所述外层的表面以平面内360°的角度均匀出射。A cone-shaped support column is provided above the ring light plate. The cone-shaped support column is a hollow structure and includes an inner layer and an outer layer. The inner layer and the outer layer are formed between the inner layer and the outer layer. In the light source cavity, a plurality of protrusions are protruded on the inner surface of the inner layer, and the plurality of protrusions are arranged so that the light emitted by the plurality of light sources is flat from the surface of the outer layer of the tapered support pillar. It shoots evenly within an angle of 360 °.
在一实施例中,所述多个凸起沿所述锥形支撑柱的中心轴线对称分布。In an embodiment, the plurality of protrusions are symmetrically distributed along a central axis of the tapered support post.
在一实施例中,所述多个凸起的直径的单边分布符合高斯曲线。In one embodiment, the unilateral distribution of the diameters of the plurality of protrusions conforms to a Gaussian curve.
在一实施例中,所述多个凸起与所述锥形支撑柱一体成型。In one embodiment, the plurality of protrusions are integrally formed with the tapered support post.
在一实施例中,所述锥形支撑柱的内顶角为圆角。In an embodiment, the inner vertex angle of the tapered support post is a rounded corner.
在一实施例中,所述外层的外表面的上部设置有磨砂层。In one embodiment, a frosted layer is provided on an upper portion of the outer surface of the outer layer.
在一实施例中,位于所述内顶角上方的所述外层的外表面设置有磨砂层。In an embodiment, a frosted layer is disposed on an outer surface of the outer layer above the inner vertex angle.
在一实施例中,上述直下式背光模组还包括:背板和设置于所述背板上方的扩散板,所述背板和所述扩散板之间的腔体形成混光腔,所述环形灯板和所述锥形支撑柱设置在所述混光腔中,所述锥形支撑柱的高度不大于混光腔的腔体深度。In an embodiment, the direct type backlight module further includes a back plate and a diffusion plate disposed above the back plate, and a cavity between the back plate and the diffusion plate forms a light mixing cavity. A ring lamp plate and the cone-shaped support post are disposed in the light mixing cavity, and the height of the cone-shaped support post is not greater than the cavity depth of the light mixing cavity.
在一实施例中,所述锥形支撑柱的底面间隔设置有多个容置孔,所述多个容置孔设置为容纳所述光源。In an embodiment, a plurality of accommodating holes are arranged on the bottom surface of the tapered support post at intervals, and the plurality of accommodating holes are configured to receive the light source.
在一实施例中,所述环形灯板上还设置有多个垫块,所述多个垫块与所述光源交错分布,所述多个容置孔分别设置为容纳所述多个光源和所述多个垫块。In an embodiment, a plurality of pads are further provided on the ring light board, the plurality of pads are staggered with the light source, and the plurality of accommodating holes are respectively configured to receive the plurality of light sources and The plurality of pads.
在一实施例中,其中,每个凸起的形状为半圆形。In an embodiment, the shape of each protrusion is semicircular.
在一实施例中,所述环形灯板和所述锥形支撑柱的高度之和与所述混光腔的腔体深度的差值小于1毫米。In an embodiment, the difference between the sum of the heights of the ring lamp plate and the cone-shaped support column and the cavity depth of the light mixing cavity is less than 1 mm.
在一实施例中,所述环形灯板中被所述锥形支撑柱罩住的区域设置有反射片27。In an embodiment, a reflective sheet 27 is disposed in an area covered by the cone-shaped support post in the ring lamp plate.
在一实施例中,所述环形灯板上还设置有正负极焊盘,设置为为所述多个光源提供电能。In an embodiment, a positive and negative electrode pad is further provided on the ring lamp plate, and is configured to provide power to the plurality of light sources.
本公开还提供一种显示器,能够获得均匀的视效品质,且简化了模组架构,降低生产成本。The present disclosure also provides a display, which can obtain uniform visual effect quality, simplify the module structure, and reduce the production cost.
本公开还提供了一种显示器,包括如上所述的直下式背光模组。The present disclosure also provides a display including the direct type backlight module as described above.
本公开提供的一种直下式背光模组及显示器,在不使用传统透镜和光学膜片的前提下,采用锥形支撑柱搭配环形灯板形成的光源组件,即可实现任一平面内360°均匀发光,满足光学和视效要求,解决了传统直下式背光模组存在的视效不均及支架暗影问题,且简化了灯板的生产工艺及模组架构,缩短项目开发周期,节约成本。同时,相比于传统背光模组,本实施方式提供的直下式背光模组更适用于超薄类的、高技术难度的直下式背光设计,具有广阔的市场前景。The direct-type backlight module and display provided by the present disclosure can realize a 360 ° in any plane by using a light source component formed by a cone-shaped support column and a ring light plate without using a traditional lens and an optical film. Uniform light emission, meets the requirements of optics and visual effects, solves the problems of uneven visual effects and bracket shadows of traditional direct-type backlight modules, simplifies the production process and module structure of the light board, shortens the project development cycle and saves costs. At the same time, compared with the conventional backlight module, the direct-type backlight module provided in this embodiment is more suitable for ultra-thin, high-tech difficulty direct-type backlight designs, and has a broad market prospect.
附图说明BRIEF DESCRIPTION OF THE DRAWINGS
图1是相关技术中的直下式背光模组的截面示意图;1 is a schematic cross-sectional view of a direct type backlight module in the related art;
图2是相关技术中的直下式背光模组的视效示意图;2 is a schematic view of visual effects of a direct type backlight module in the related art;
图3是相关技术中的直下式背光模组的支架暗影示意图;3 is a schematic diagram of a bracket shadow of a direct type backlight module in the related art;
图4是一实施例提供的光源组件的结构示意图;4 is a schematic structural diagram of a light source assembly according to an embodiment;
图5是一实施例提供的直下式背光模组的结构示意图;5 is a schematic structural diagram of a direct type backlight module according to an embodiment;
图6是一实施例提供的锥形支撑柱的截面示意图;6 is a schematic cross-sectional view of a tapered support post according to an embodiment;
图7是一实施例提供的凸点直径的单边分布曲线;7 is a unilateral distribution curve of a bump diameter provided by an embodiment;
图8是一实施例提供的凸点分布曲线;8 is a bump distribution curve provided by an embodiment;
图9是一实施例提供的环形灯板的结构示意图。FIG. 9 is a schematic structural diagram of a ring light plate according to an embodiment.
其中:among them:
1’-支架;2’-背板;3’-反射片;4’-扩散板;5’-膜片;6-’LED;7’-透镜;8’-暗角;9’-暗区;10’-亮区;1'-bracket; 2'-back plate; 3'-reflector; 4'-diffusion plate; 5'-diaphragm; 6''LED; 7'-lens; 8'-dark angle; 9'-dark area 10'-bright area;
1-环形灯板;11-光源;12-垫块;13-正负极焊盘;1-ring light board; 11-light source; 12-pad; 13-positive and negative pads;
2-锥形支撑柱;21-凸起;22-中心轴线;23-内顶角;24-磨砂层;25-容置孔;26-环形固定板;261-遮光胶条;262-螺纹孔;27-反射片;3-背板;4-扩散板。2-conical support column; 21-convex; 22-center axis; 23-inner vertex angle; 24-frosted layer; 25-receiving hole; 26-ring fixing plate; 261-light-shielding rubber strip; 262-threaded hole 27-reflective sheet; 3-back plate; 4-diffusion plate.
具体实施方式detailed description
下面结合附图并通过具体实施方式来说明本公开的技术方案。The technical solutions of the present disclosure will be described below with reference to the accompanying drawings and specific embodiments.
在本公开的描述中,术语“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公开和简化描述,而不是指示或暗示所指的装置或元件必须具有指定的方位、以指定的方位构造和操作,因此不能理解为对本公开的限制。In the description of this disclosure, the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", " The directions or positional relations indicated by “inside” and “outside” are based on the positional or positional relations shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a designation It is constructed and operated in a specified orientation, and therefore cannot be understood as a limitation on the present disclosure.
本实施例提供一种直下式背光模组,包括背板3、光源组件和扩散板4,背板3和扩散板4之间的腔体形成混光腔,光源组件设置在混光腔中,光源组件由环形灯板1和锥形支撑柱2装配而成。如图4所示,环形灯板1上间隔设置有多个光源11(比如LED等),锥形支撑柱2设置于环形灯板1的上方,锥形支撑柱2为中空结构,包括内层和外层,内层和外层之间形成光源腔,光源11发出的光能进入光源腔内部进行规律性全反射,内层的内表面上凸设有多个凸起21,该凸起21能够破坏这种全反射,使得光能从锥形支撑柱2的外层的表面以平面内360°的角度均匀出射,从而将LED点光源转换成为稳定、均匀的面光源。相较于传统透镜,该凸起21可以灵活调整,方便调整背光模组的光能利用率和光能分布以实现均匀的出光视效,不需依赖传统透镜和膜片,简化模组架构、降低生产成本。This embodiment provides a direct type backlight module, which includes a back plate 3, a light source component, and a diffusion plate 4. The cavity between the back plate 3 and the diffusion plate 4 forms a light mixing cavity, and the light source component is disposed in the light mixing cavity. The light source assembly is assembled by a ring lamp plate 1 and a tapered support post 2. As shown in FIG. 4, a plurality of light sources 11 (such as LEDs) are arranged on the ring lamp plate 1 at intervals. The tapered support column 2 is disposed above the ring lamp plate 1. The tapered support column 2 is a hollow structure including an inner layer. A light source cavity is formed between the inner layer and the outer layer. The light emitted from the light source 11 enters the light source cavity for regular total reflection. The inner surface of the inner layer is provided with a plurality of protrusions 21, and the protrusions 21 This total reflection can be destroyed, so that light can be uniformly emitted from the surface of the outer layer of the tapered support post 2 at an angle of 360 ° in the plane, thereby converting the LED point light source into a stable and uniform surface light source. Compared with the traditional lens, the protrusion 21 can be flexibly adjusted, which is convenient for adjusting the light energy utilization ratio and light energy distribution of the backlight module to achieve uniform light output visual effect, without relying on the traditional lens and diaphragm, simplifying the module structure and reducing Cost of production.
在一实施例中,凸起21的形状为半圆形。In one embodiment, the shape of the protrusion 21 is semicircular.
在一实施例中,参见图5,锥形支撑柱2的内顶角23为圆角,目的在于使光能平滑过度,防止光能分布上的突变而造成的视效区分。锥形支撑柱2的外顶角可以设置为尖角,用α表示,α的取值范围为30°-90°,α的取值需根据实际情况而定,本实施例不作过多限制。In an embodiment, referring to FIG. 5, the inner apex angle 23 of the tapered support column 2 is a rounded corner, the purpose of which is to smooth the light energy excessively and prevent the visual effect discrimination caused by the sudden change in the light energy distribution. The outer apex angle of the tapered support column 2 can be set as a sharp angle, which is expressed by α. The value of α ranges from 30 ° to 90 °. The value of α needs to be determined according to the actual situation, which is not limited in this embodiment.
内顶角23所在平面以上的区域内会积攒较多的光能,为避免该区域形成亮斑,内顶角23上方的锥形支撑柱2的外表面设置有磨砂层24,以利于破坏光能原有的规律出射分布,获得更佳的视效品质。A large amount of light energy will accumulate in the area above the plane where the inner vertex angle 23 is located. In order to avoid the formation of bright spots in this area, the outer surface of the tapered support column 2 above the inner vertex angle 23 is provided with a matte layer 24 to facilitate the destruction of light It can emit the original regular distribution, and obtain better visual quality.
如图5所示,环形灯板1和锥形支撑柱2的高度之和不大于背板3的腔体深度,即混光腔的腔体深度。例如,环形灯板1和锥形支撑柱2的高度之和用H表示,混光腔的深度用D表示,在一实施例中,D和H之间的差值不大于1毫米(mm).一般地D≈H+0.5(mm)。锥形支撑柱2的壁厚用t表示,t的取值关系到背光系统的结构稳定性,一般地,若D≤28mm,t的取值范围为1.2-1.5mm,若D>28mm,t的取值范围为1.8mm-2mm,可根据实际情况合理设计。As shown in FIG. 5, the sum of the heights of the ring lamp plate 1 and the conical support column 2 is not greater than the cavity depth of the back plate 3, that is, the cavity depth of the mixed light cavity. For example, the sum of the heights of the ring lamp plate 1 and the conical support column 2 is represented by H, and the depth of the light mixing cavity is represented by D. In one embodiment, the difference between D and H is not greater than 1 millimeter (mm). . Generally D≈H + 0.5 (mm). The wall thickness of the tapered support column 2 is represented by t. The value of t is related to the structural stability of the backlight system. Generally, if D≤28mm, the value of t ranges from 1.2-1.5mm, and if D> 28mm, t The value range is 1.8mm-2mm, which can be designed reasonably according to the actual situation.
在一实施例中,如图5-图8所示,锥形支撑柱2内部的凸起21与锥形支撑柱2为注塑一体成型结构,凸起21的材质为PMMA或PS等光学级的导光材料。多个凸起21沿锥形支撑柱2的中心轴线22呈中心对称分布设置,多个凸起21的直径的单边分布基本符合高斯曲线,呈现两边小中间大的趋势,即由底部到顶部凸起21的直径呈现逐渐增大的趋势。若以图5中左下角的凸起21位置为坐标原点,单边凸起21直径由小到大(由下到上)的分布符合函数曲线:Φ=A*X^B+C,其中Φ为凸起21直径,X为凸起21的相对坐标,A、B为曲线的曲率参数,C为最小凸起21的直径,通过调整A、B两项参数来获取合理的凸起21分布曲线。实际表明,曲线越平滑,所得到的光学效果越均匀。如图7所示,将上述单边曲线镜像后逆时针旋转90°,再将中间部分局部拉低微调平滑,就得到凸起21的整体分布曲线。理论上,同一水平线上的凸起21直径一样,且凸起21的最小直径可达0.1mm。In an embodiment, as shown in FIG. 5 to FIG. 8, the protrusion 21 inside the tapered support column 2 and the tapered support column 2 are integrally formed by injection molding. The material of the protrusion 21 is optical grade such as PMMA or PS. Light guide material. The plurality of protrusions 21 are arranged symmetrically along the center axis 22 of the tapered support column 2. The unilateral distribution of the diameters of the plurality of protrusions 21 basically conforms to the Gaussian curve, showing a trend of small sides and large sides, that is, from bottom to top. The diameter of the protrusions 21 gradually increases. If the position of the protrusion 21 in the lower left corner in FIG. 5 is used as the coordinate origin, the distribution of the diameter of the unilateral protrusion 21 from small to large (from bottom to top) conforms to the function curve: Φ = A * X ^ B + C, where Φ Is the diameter of the protrusion 21, X is the relative coordinates of the protrusion 21, A and B are the curvature parameters of the curve, C is the diameter of the smallest protrusion 21, and a reasonable distribution curve of the protrusion 21 is obtained by adjusting the two parameters of A and B . The actual results show that the smoother the curve, the more uniform the optical effect obtained. As shown in FIG. 7, after the above unilateral curve is mirrored and rotated 90 ° counterclockwise, and then the middle part is partially pulled down and fine-tuned to smooth, the overall distribution curve of the protrusions 21 is obtained. In theory, the protrusions 21 on the same horizontal line have the same diameter, and the minimum diameter of the protrusions 21 can reach 0.1 mm.
如图9所示,环形灯板1上环形阵列排布多个光源11,一般为LED灯珠,LED灯珠的数量取决于背光的亮度需求。由于锥形支撑柱2的材质的耐热点较低,光源11的温度较高,容易导致锥形支撑柱2的稳定性受到影响,因此,为保证锥形支撑柱2的工作稳定性,环形灯板1上还设置有多个垫块12。垫块12与光源11交错间隔分布,垫块12可以是合金材质或FR4。相应的,锥形支撑柱2的底面间隔设置有多个不同高度的容置孔25,一部分容置孔25设置为容纳光源11,另一部分容置孔25设置为容纳垫块12。环形灯板1上还设置有正负极焊盘13,设置为为光源11提供电能。As shown in FIG. 9, a plurality of light sources 11 are arranged in a ring array on the ring lamp plate 1, which are generally LED lamp beads. The number of LED lamp beads depends on the brightness requirement of the backlight. Because the material of the tapered support post 2 has a lower heat resistance point and the temperature of the light source 11 is higher, the stability of the tapered support post 2 is likely to be affected. Therefore, in order to ensure the working stability of the tapered support post 2, the ring lamp The plate 1 is further provided with a plurality of pads 12. The spacers 12 and the light source 11 are staggered and spaced. The spacers 12 may be made of alloy material or FR4. Correspondingly, a plurality of accommodating holes 25 of different heights are provided on the bottom surface of the tapered support column 2 at intervals, one part of the accommodating holes 25 is provided to receive the light source 11, and another part of the accommodating holes 25 is provided to receive the cushion block 12. The ring lamp plate 1 is further provided with positive and negative electrode pads 13 configured to provide power to the light source 11.
环形灯板1可根据需求设计为不同厚度,一般情况下环形灯板1的厚度的取值范围为0.8mm-1.2mm。设定垫块12的高度为p,LED的高度为q,则p和q须满足0.2mm≤p-q≤0.4mm。The ring light plate 1 can be designed with different thicknesses according to requirements. Generally, the thickness of the ring light plate 1 ranges from 0.8 mm to 1.2 mm. Set the height of the pad 12 to p and the height of the LED to q, then p and q must satisfy 0.2mm≤p-q≤0.4mm.
锥形支撑柱2的下部设置环形固定板26,该环形固定板26的上表面贴附有一圈遮光胶条261,以防止光能损失。在一实施例中,遮光胶条261选用银反射膜。环形固定板26上还间隔设置有螺纹孔262,设置为将锥形支撑柱2固定在背板3上。环形灯板1被锥形支撑柱2罩住的部分,即设置有凸起21的内层在水平方向的投影区域,需设置反射片27,反射片27的反射率δ≥99%,反射片27的反射效果远好于环形灯板1上表面的油墨层,可以有效防止光能的损耗。A ring-shaped fixing plate 26 is provided at the lower part of the cone-shaped support column 2. A ring of light-shielding rubber strips 261 is attached to the upper surface of the ring-shaped fixing plate 26 to prevent the loss of light energy. In one embodiment, the light-shielding rubber strip 261 is a silver reflective film. The annular fixing plate 26 is further provided with threaded holes 262 at intervals, and is configured to fix the tapered support post 2 on the back plate 3. The portion of the ring lamp plate 1 covered by the cone-shaped support column 2, that is, the projection area of the inner layer provided with the protrusion 21 in the horizontal direction, needs to be provided with a reflective sheet 27, the reflectance of the reflective sheet 27 δ ≥ 99%, and the reflective sheet The reflection effect of 27 is far better than that of the ink layer on the upper surface of the ring lamp plate 1, which can effectively prevent the loss of light energy.
将传统直下式背光模组的光学效果图与使用本实施方式提供的直下式背光模组的光学效果图进行对比,结果显示,传统的直下式背光模组的视效会呈现出很严重的区域性,如暗角、灯颗影等问题,数据上呈现为屏体发光面的均一性很差,仅有50%左右;而采用本实施方式提供的直下式背光模组,直下式背光模组的光能分布均匀且过度平滑,整屏没有明显的区域性,不存在传统直下式模组的视效问题点,实测本实施方式提供的直下式背光模组的屏体均一性达80%以上,相比相关技术有大幅提升。Comparing the optical effects of the traditional direct-type backlight module with the optical effects of the direct-type backlight module provided in this embodiment, the results show that the visual effects of the traditional direct-type backlight module will present a very serious area Problems such as vignetting and lamp shadows, the uniformity of the light emitting surface of the screen is poor on the data, only about 50%; and the direct-type backlight module and direct-type backlight module provided by this embodiment are used. The light energy distribution is uniform and excessively smooth. There is no obvious regionality of the entire screen. There are no visual effects of traditional direct-type modules. The measured uniformity of the direct-type backlight module provided by this embodiment is more than 80%. Compared with related technologies, it has been greatly improved.
本实施方式提供的直下式背光模组,在不使用传统透镜和光学膜片的前提下,采用锥形支撑柱2搭配环形灯板1形成的光源组件,即可实现任一平面内360°均匀发光,满足光学和视效要求,解决了传统直下式背光模组存在的视效不均及支架暗影问题,且简化了灯板的生产工艺及模组架构,缩短项目开发周期,节约成本。同时,相比于传统背光模组,本实施方式提供的直下式背光模组更适用于超薄类的、高技术难度的直下式背光设计,具有广阔的市场前景。The direct-type backlight module provided by this embodiment can achieve a uniform 360 ° uniformity in any plane by using a light source assembly formed by a tapered support column 2 and a ring light plate 1 without using a traditional lens and an optical film. It emits light, meets the requirements of optics and visual effects, solves the problems of uneven visual effects and the shadow of the bracket of the traditional direct-type backlight module, simplifies the production process of the light board and the module structure, shortens the project development cycle and saves costs. At the same time, compared with the conventional backlight module, the direct-type backlight module provided in this embodiment is more suitable for ultra-thin, high-tech difficulty direct-type backlight designs, and has a broad market prospect.
本实施方式还提出一种显示器,该显示器包括上述的直下式背光模组,该直下式背光模组的结构参照上述实施例,由于本显示器采用了上述实施例的全部技术方案,因此至少具有上述实施例的技术方案所带来的所有有益效果,在此不再一一赘述。This embodiment also provides a display. The display includes the direct-type backlight module described above. The structure of the direct-type backlight module refers to the above embodiment. Since the display uses all the technical solutions of the above embodiment, it has at least the above All the beneficial effects brought by the technical solutions of the embodiments are not repeated here one by one.

Claims (15)

  1. 一种直下式背光模组,包括:A direct type backlight module includes:
    环形灯板(1),所述环形灯板(1)上间隔设置有多个光源(11);A ring light plate (1), wherein a plurality of light sources (11) are arranged on the ring light plate (1) at intervals;
    锥形支撑柱(2),所述锥形支撑柱(2)设置于所述环形灯板(1)的上方,所述锥形支撑柱(2)为中空结构,包括内层和外层,所述内层和所述外层之间形成光源腔,所述内层的内表面上凸设有多个凸起(21),所述多个凸起(21)设置为使得所述多个光源(11)发出的光从所述锥形支撑柱(2)的所述外层的表面以平面内360°的角度均匀出射。A cone-shaped support column (2) is disposed above the ring light plate (1), and the cone-shaped support column (2) is a hollow structure including an inner layer and an outer layer, A light source cavity is formed between the inner layer and the outer layer. A plurality of protrusions (21) are protruded on the inner surface of the inner layer, and the plurality of protrusions (21) are arranged so that the plurality of The light emitted by the light source (11) is uniformly emitted from the surface of the outer layer of the tapered support post (2) at an angle of 360 ° in the plane.
  2. 根据权利要求1所述的直下式背光模组,其中,所述多个凸起(21)沿所述锥形支撑柱(2)的中心轴线(22)对称分布。The direct type backlight module according to claim 1, wherein the plurality of protrusions (21) are symmetrically distributed along a central axis (22) of the tapered support post (2).
  3. 根据权利要求2所述的直下式背光模组,其中,所述多个凸起(21)的直径的单边分布符合高斯曲线。The direct type backlight module according to claim 2, wherein the unilateral distribution of the diameters of the plurality of protrusions (21) conforms to a Gaussian curve.
  4. 根据权利要求1、2或3所述的直下式背光模组,其中,所述多个凸起(21)与所述锥形支撑柱(2)一体成型。The direct type backlight module according to claim 1, 2 or 3, wherein the plurality of protrusions (21) are integrally formed with the tapered support post (2).
  5. 根据权利要求1-4任一项所述的直下式背光模组,其中,所述锥形支撑柱(2)的内顶角(23)为圆角。The direct-type backlight module according to any one of claims 1-4, wherein an inner vertex angle (23) of the tapered support post (2) is a rounded corner.
  6. 根据权利要求5所述的直下式背光模组,其中,所述外层的外表面的上部设置有磨砂层(24)。The direct type backlight module according to claim 5, wherein a frosted layer (24) is provided on an upper portion of an outer surface of the outer layer.
  7. 根据权利要求6所述的直下式背光模组,其中,位于所述内顶角(23)上方的所述外层的外表面设置有磨砂层(24)。The direct type backlight module according to claim 6, wherein a matte layer (24) is provided on an outer surface of the outer layer above the inner top corner (23).
  8. 根据权利要求1-7任一项所述的直下式背光模组,还包括:背板(3)和设置于所述背板(3)上方的扩散板(4),所述背板(3)和所述扩散板(4)之间的腔体形成混光腔,所述环形灯板(1)和所述锥形支撑柱(2)设置在所述混光腔中,环形灯板(1)和所述锥形支撑柱(2)的高度之和不大于所述混光腔的腔体深度。The direct type backlight module according to any one of claims 1 to 7, further comprising: a back plate (3) and a diffusion plate (4) disposed above the back plate (3), the back plate (3) ) And the diffuser plate (4) form a light mixing cavity, the ring light plate (1) and the cone-shaped support column (2) are arranged in the light mixing cavity, and the ring light plate ( The sum of the height of 1) and the cone-shaped support column (2) is not greater than the cavity depth of the light mixing cavity.
  9. 根据权利要求1-8任一项所述的直下式背光模组,其中,所述锥形支撑柱(2)的底面间隔设置有多个容置孔(25),所述多个容置孔(25)设置为容纳所述光源(11)。The direct-type backlight module according to any one of claims 1 to 8, wherein the bottom surface of the tapered support post (2) is provided with a plurality of receiving holes (25) at intervals, and the plurality of receiving holes (25) is arranged to receive the light source (11).
  10. 根据权利要求9所述的直下式背光模组,其中,所述环形灯板(1)上还设置有多个垫块(12),所述多个垫块(12)与所述多个光源(11)交错分布,所述多个容置孔(25)分别设置为容纳所述多个光源(11)和所述多个垫块(12)。The direct-type backlight module according to claim 9, wherein the ring lamp plate (1) is further provided with a plurality of pads (12), the plurality of pads (12) and the plurality of light sources (11) Staggered distribution, the plurality of accommodating holes (25) are respectively arranged to receive the plurality of light sources (11) and the plurality of pads (12).
  11. 根据权利要求1-10所述的直下式背光模组,其中,每个凸起(21)的形状为半圆形。The direct type backlight module according to claim 1-10, wherein a shape of each protrusion (21) is a semi-circular shape.
  12. 根据权利要求8所述的直下式背光模组,其中,所述环形灯板(1)和所述锥形支撑柱(2)的高度之和与所述混光腔的腔体深度的差值小于1毫米。The direct-type backlight module according to claim 8, wherein a difference between a sum of heights of the ring lamp plate (1) and the tapered support post (2) and a cavity depth of the light mixing cavity Less than 1 mm.
  13. 根据权利要求1-12任一项所述的直下式背光模组,其中,所述环形灯板(1)中被所述锥形支撑柱(2)罩住的区域设置有反射片(27)。The direct-type backlight module according to any one of claims 1-12, wherein a reflective sheet (27) is provided in an area covered by the cone-shaped support post (2) in the ring light plate (1). .
  14. 根据权利要求1-13任一项所述的直下式背光模组,其中,所述环形灯板(1)上还设置有正负极焊盘(13),设置为为所述多个光源(11)提供电能。The direct type backlight module according to any one of claims 1-13, wherein the ring lamp plate (1) is further provided with positive and negative electrode pads (13), configured to be the plurality of light sources ( 11) Provide power.
  15. 一种显示器,包括如权利要求1-14任一项所述的直下式背光模组。A display comprising the direct type backlight module according to any one of claims 1-14.
PCT/CN2019/070568 2018-07-16 2019-01-07 Direct-type backlight module and display WO2020015341A1 (en)

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