CN111913321A - 背光模组及具有其的显示装置 - Google Patents
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Abstract
本发明提供了一种背光模组及具有其的显示装置,其中,背光模组包括:基板;LED发光单元,LED发光单元为多个,多个LED发光单元沿基板的长度方向和宽度方向相间隔地设置在基板上,其中,相邻两个LED发光单元的中心间距A大于等于4mm且小于等于20mm;基板包括多个控制区域,各控制区域内具有至少一个LED发光单元,各控制区域内的LED发光单元能够被单独控制,以实现对各控制区域的亮度或颜色进行调节。本发明解决了现有技术中的LED显示装置的LCD画面的颜色饱和度和明暗对比程度差以及LED显示装置的经济性差的问题。
Description
技术领域
本发明涉及LED灯照明技术技术领域,具体而言,涉及一种背光模组及具有其的显示装置,其中,主要对背光模组的结构进行了优化改进。
背景技术
现有的显示装置的背光模组只能实现整体背光变亮或者变暗,无法实现区域明暗对比,因此,显示装置的画面亮度层次变化时,无法真实的体现出来,易导致画面失真,动态感不强,影响了用户的观看体验。
在灯光照明技术领域中,LCD业界为了进一步提升画质,尤其是针对经常被OLED阵营抨击的对比度表现差的问题,开始广为采用Local Dimming背光源技术以达成HDR功能,从而大幅提升对比度表现以达到与OLED相同的等级;而如何在提升LCD画面的颜色饱和度和明暗对比程度以满足用户的观看体验的前提下,又能够有效地控制其加工制造成本,以使得LED显示装置具有良好的经济性和市场竞争力,便成了业界亟待解决的问题。
发明内容
本发明的主要目的在于提供一种背光模组及具有其的显示装置,以解决现有技术中的LED显示装置的LCD画面的颜色饱和度和明暗对比程度差以及LED显示装置的经济性差的问题。
为了实现上述目的,根据本发明的一个方面,提供了一种背光模组,包括:基板;LED发光单元,LED发光单元为多个,多个LED发光单元沿基板的长度方向和宽度方向相间隔地设置在基板上,其中,相邻两个LED发光单元的中心间距A大于等于4mm且小于等于20mm;基板包括多个控制区域,各控制区域内具有至少一个LED发光单元,各控制区域内的LED发光单元能够被单独控制,以实现对各控制区域的亮度或颜色进行调节。
进一步地,多个控制区域的个数在500个至100万个之间,各控制区域内的LED发光单元的个数在1个至100个之间,各控制区域内的所有LED发光单元串联和/或并联,背光模组还包括用于控制LED发光单元开关或调节LED发光单元亮度的驱动结构,且各控制区域以并联的形式与驱动结构连接。
进一步地,LED发光单元为蓝光LED器件,且LED发光单元在通过10mA电流时,其光通量大于等于0.2流明且小于等于0.8流明;或LED发光单元为白光LED器件,且LED发光单元在通过10mA电流时,其光通量大于等于2流明且小于等于6流明。
进一步地,沿基板的长度方向的相邻的两个LED发光单元的第一中心间距A1大于或等于沿基板的宽度方向的相邻的两个LED发光单元的第二中心间距A2。
进一步地,多个LED发光单元以矩阵的形式分布在基板上。
进一步地,LED发光单元在基板上的投影呈圆形、椭圆形、长方形或正方形。
根据本发明的另一个方面,提供了一种显示装置,包括间隔设置的背光模组和光学模组,其中,背光模组为上述的背光模组,光学模组包括光学部件层和转化膜片层和液晶玻璃层。
进一步地,背光模组和光学模组之间的间隔距离大于等于1mm且小于等于12mm。
进一步地,光学部件层包括扩散板、扩散膜和棱镜膜,转化膜片层为荧光转化膜或量子点转化膜。
进一步地,显示装置的亮度大于等于250尼特且小于等于2000尼特。
应用本发明的技术方案,通过对LED显示装置的背光模组的各部分结构进行优化,能够使地LED显示装置达到OLED的显示画面效果,而更大的优势是,相比于OLED,本申请提供的显示装置的价格更为低廉,具有优良的经济特性。
具体而言,首先,通过对背光模组的多个LED发光单元的排布方式进行优化,将多个LED发光单元沿基板的长度方向和宽度方向相间隔地设置在基板上,且使得相邻两个LED发光单元的中心间距A大于等于4mm且小于等于20mm;这样,对背光模组的一个重要的尺寸参数,即对Pitch值进行了具体范围的限定,从而在确保背光模组能够达到预设的发光性能的前提下,大大地减少了LED发光单元的使用量,降低了背光模组的生产成本,进而提高了显示装置的经济性。
其次,通过将基板划分出多个控制区域,各控制区域内设置有至少一个LED发光单元,各控制区域内的LED发光单元能够被单独控制,以实现对各控制区域的亮度或颜色进行调节。这样,对多个控制区域中的一个或多个独立控制,从而使得显示装置显示的画面具有明显的明暗对比度差,且具有很高的颜色饱和度,提高了显示装置的现象效果,进而有利于提升用户的观影体验。
因此,本申请提供的背光模组及具有其的显示装置能够有效地控制LED发光单元的使用数量,提升其经济性能;同时能够确保显示装置显示的画面具有很高的颜色饱和度以及明暗对比度差,提升了其实用性能。
附图说明
构成本申请的一部分的说明书附图用来提供对本发明的进一步理解,本发明的示意性实施例及其说明用于解释本发明,并不构成对本发明的不当限定。在附图中:
图1示出了根据本发明的实施例一的背光模组的多个LED发光单元的分布示意图;
图2示出了根据本发明的实施例二的背光模组的多个LED发光单元的分布示意图;
图3示出了根据本发明的实施例三的背光模组的多个LED发光单元的分布示意图;
图4示出了根据本发明的一种可选实施例的显示装置的结构示意图。
其中,上述附图包括以下附图标记:
1、背光模组;10、基板;11、控制区域;20、LED发光单元;2、光学模组;201、光学部件层;202、转化膜片层;203、液晶玻璃层。
具体实施方式
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅是本发明一部分实施例,而不是全部的实施例。以下对至少一个示例性实施例的描述实际上仅仅是说明性的,决不作为对本发明及其应用或使用的任何限制。基于本发明中的实施例,本领域普通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,都属于本发明保护的范围。
为了解决现有技术中的LED显示装置的LCD画面的颜色饱和度和明暗对比程度差以及LED显示装置的经济性差的问题,本发明提供了一种背光模组和显示装置,如图4所示,显示装置包括间隔设置的背光模组1和光学模组2,其中,背光模组1为上述和下述的背光模组,光学模组2包括光学部件层201和转化膜片层202和液晶玻璃层203。
实施例一
如图1所示,背光模组包括基板10和LED发光单元20,LED发光单元20为多个,多个LED发光单元20沿基板10的长度方向和宽度方向相间隔地设置在基板10上,其中,相邻两个LED发光单元20的中心间距A大于等于4mm且小于等于20mm;基板10包括多个控制区域11,各控制区域11内具有至少一个LED发光单元20,各控制区域11内的LED发光单元20能够被单独控制,以实现对各控制区域11的亮度或颜色进行调节。
通过对LED显示装置的背光模组1的各部分结构进行优化,能够使地LED显示装置达到OLED的显示画面效果,而更大的优势是,相比于OLED,本申请提供的显示装置的价格更为低廉,具有优良的经济特性。
具体而言,首先,通过对背光模组1的多个LED发光单元20的排布方式进行优化,将多个LED发光单元20沿基板10的长度方向和宽度方向相间隔地设置在基板10上,且使得相邻两个LED发光单元20的中心间距A大于等于4mm且小于等于20mm;这样,对背光模组1的一个重要的尺寸参数,即对Pitch值进行了具体范围的限定,从而在确保背光模组1能够达到预设的发光性能的前提下,大大地减少了LED发光单元20的使用量,降低了背光模组1的生产成本,进而提高了显示装置的经济性。
其次,通过将基板10划分出多个控制区域11,各控制区域11内设置有至少一个LED发光单元20,各控制区域11内的LED发光单元20能够被单独控制,以实现对各控制区域11的亮度或颜色进行调节。这样,对多个控制区域11中的一个或多个独立控制,从而使得显示装置显示的画面具有明显的明暗对比度差,且具有很高的颜色饱和度,提高了显示装置的现象效果,进而有利于提升用户的观影体验。
综上,本申请提供的背光模组1及具有其的显示装置能够有效地控制LED发光单元的使用数量,提升其经济性能;同时能够确保显示装置显示的画面具有很高的颜色饱和度以及明暗对比度差,提升了其实用性能。
具体而言,本申请提供的显示装置利用Local Dimming背光源技术或单点控制背光源技术以达成HDR功能,其效果可以匹配OLED电视所显示画面的效果,但其成本却只有OLED电视的40%-70%;对比于OLED电视能实现区域控制的效果,本申请的显示装置采用LED发光单元20,通过对多个LED发光单元20之间串并电路的设计,由驱动结构对多个控制区域11实现控制,形成多个能够被单独控制的控制区域11,以达到OLED电视所显示画面的效果。
为了使得显示装置能够应用于不同等级规格的电视屏幕的制造中,即显示装置显示的画面的颜色饱和度以及明暗对比度差可精确调控,以提高显示装置的实用性,可选地,多个控制区域11的个数在500个至100万个之间,各控制区域11内的LED发光单元20的个数在1个至100个之间,各控制区域11内的所有LED发光单元20串联和/或并联,背光模组还包括用于控制LED发光单元20开关或调节LED发光单元20亮度的驱动结构,且各控制区域11以并联的形式与驱动结构连接。
在本申请的优先实施例中,LED发光单元20为蓝光LED器件,且LED发光单元20在通过10mA电流时,其光通量大于等于0.2流明且小于等于0.8流明;蓝光LED器件在通过10mA电流时,光通量在此范围内的LED发光单元20具有最佳的发光效果,从而使得显示装置在满足于节能性能的同时,显示的画面具有良好的颜色饱和度。
当然,在本申请的一个未图示的可选实施例中,LED发光单元20为白光LED器件,且LED发光单元20在通过10mA电流时,其光通量大于等于2流明且小于等于6流明。同样地,白光LED器件在通过10mA电流时,光通量在此范围内的LED发光单元20具有最佳的发光效果,从而使得显示装置在满足于节能性能的同时,显示的画面具有良好的颜色饱和度。
当然,在本申请的一个未图示的可选实施例中,LED发光单元20为LED芯片,LED芯片上覆盖有封装胶体以保护LED芯片。
如图1所示,沿基板10的长度方向的相邻的两个LED发光单元20的第一中心间距A1大于或等于沿基板10的宽度方向的相邻的两个LED发光单元20的第二中心间距A2。这种LED发光单元20的排布方式更有利于提升背光模组1的发光效果,以提升显示装置的显像性能。
在本实施例中,多个LED发光单元20以矩阵的形式分布在基板10上。多个LED发光单元20这种排布方式更有利于背光模组1的批量化加工生产制造,提升背光模组1的制造效率。
如图1所示,LED发光单元20在基板10上的投影呈圆形。LED发光单元20在基板10上的投影呈圆形取决于LED发光单元20的结构形状,其整体为圆柱形轮廓,便于加工生产制造,且单个LED发光单元20的发光性能优良,有利于提升显示装置的显像性能。
实施例二
如图2所示,该实施例与实施例一的区别在于,LED发光单元20在基板10上的投影呈正方形,这也取决于LED发光单元20的结构形状,其整体为截面为正方形的柱体,不仅便于加工生产制造,具有良好的发光性能,而且能够提升背光模组1的外光美感,有利于调控背光模组1的发光效果。
实施例三
如图3所示,该实施例与实施例一的区别在于,LED发光单元20在基板10上的投影呈长方形,这也取决于LED发光单元20的结构形状,其整体为截面为长方形的柱体,不仅便于加工生产制造,具有良好的发光性能,而且能够提升背光模组1的外光美感,有利于调控背光模组1的发光效果。
当然,在本申请的一个未图示的实施例中,LED发光单元20在基板10上的投影呈椭圆形。
本申请提供的显示装置,背光模组1和光学模组2之间的间隔距离大于等于1mm且小于等于12mm。通过优化显示装置的OD值,即混光距离,有利于提高背光模组1的发光性能,从而提升显示装置的显像性能。
如图4所示,光学部件层201包括扩散板、扩散膜和棱镜膜,转化膜片层202为荧光转化膜或量子点转化膜。可选地,荧光转化膜为包括黄色荧光粉、绿色荧光粉、红色荧光粉中的至少一种荧光粉膜。
需要说明的是,利用本申请提供的技术方案加工制造成的显示装置的亮度大于等于250尼特且小于等于2000尼特。应用该显示装置制成的电视能够呈现高清的4K、8K和16K电视画面。
需要注意的是,这里所使用的术语仅是为了描述具体实施方式,而非意图限制根据本申请的示例性实施方式。如在这里所使用的,除非上下文另外明确指出,否则单数形式也意图包括复数形式,此外,还应当理解的是,当在本说明书中使用术语“包含”和/或“包括”时,其指明存在特征、步骤、操作、器件、组件和/或它们的组合。
除非另外具体说明,否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本发明的范围。同时,应当明白,为了便于描述,附图中所示出的各个部分的尺寸并不是按照实际的比例关系绘制的。对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论,但在适当情况下,所述技术、方法和设备应当被视为授权说明书的一部分。在这里示出和讨论的所有示例中,任何具体值应被解释为仅仅是示例性的,而不是作为限制。因此,示例性实施例的其它示例可以具有不同的值。应注意到:相似的标号和字母在下面的附图中表示类似项,因此,一旦某一项在一个附图中被定义,则在随后的附图中不需要对其进行进一步讨论。
为了便于描述,在这里可以使用空间相对术语,如“在……之上”、“在……上方”、“在……上表面”、“上面的”等,用来描述如在图中所示的一个器件或特征与其他器件或特征的空间位置关系。应当理解的是,空间相对术语旨在包含除了器件在图中所描述的方位之外的在使用或操作中的不同方位。例如,如果附图中的器件被倒置,则描述为“在其他器件或构造上方”或“在其他器件或构造之上”的器件之后将被定位为“在其他器件或构造下方”或“在其他器件或构造之下”。因而,示例性术语“在……上方”可以包括“在……上方”和“在……下方”两种方位。该器件也可以其他不同方式定位(旋转90度或处于其他方位),并且对这里所使用的空间相对描述作出相应解释。
需要注意的是,这里所使用的术语仅是为了描述具体实施方式,而非意图限制根据本申请的示例性实施方式。如在这里所使用的,除非上下文另外明确指出,否则单数形式也意图包括复数形式,此外,还应当理解的是,当在本说明书中使用术语“包含”和/或“包括”时,其指明存在特征、步骤、工作、器件、组件和/或它们的组合。
需要说明的是,本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象,而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换,以便这里描述的本申请的实施方式能够以除了在这里图示或描述的那些以外的顺序实施。
以上所述仅为本发明的优选实施例而已,并不用于限制本发明,对于本领域的技术人员来说,本发明可以有各种更改和变化。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。
Claims (10)
1.一种背光模组,其特征在于,包括:
基板(10);
LED发光单元(20),所述LED发光单元(20)为多个,所述多个LED发光单元(20)沿所述基板(10)的长度方向和宽度方向相间隔地设置在所述基板(10)上,其中,相邻两个所述LED发光单元(20)的中心间距A大于等于4mm且小于等于20mm;
所述基板(10)包括多个控制区域(11),各所述控制区域(11)内具有至少一个所述LED发光单元(20),各所述控制区域(11)内的所述LED发光单元(20)能够被单独控制,以实现对各所述控制区域(11)的亮度或颜色进行调节。
2.根据权利要求1所述的背光模组,其特征在于,所述多个控制区域(11)的个数在500个至100万个之间,各所述控制区域(11)内的所述LED发光单元(20)的个数在1个至100个之间,各所述控制区域(11)内的所有所述LED发光单元(20)串联和/或并联,所述背光模组还包括用于控制所述LED发光单元(20)开关或调节所述LED发光单元(20)亮度的驱动结构,且各所述控制区域(11)以并联的形式与所述驱动结构连接。
3.根据权利要求1所述的背光模组,其特征在于,
所述LED发光单元(20)为蓝光LED器件,且所述LED发光单元(20)在通过10mA电流时,其光通量大于等于0.2流明且小于等于0.8流明;或
所述LED发光单元(20)为白光LED器件,且所述LED发光单元(20)在通过10mA电流时,其光通量大于等于2流明且小于等于6流明。
4.根据权利要求1所述的背光模组,其特征在于,沿所述基板(10)的长度方向的相邻的两个所述LED发光单元(20)的第一中心间距A1大于或等于沿所述基板(10)的宽度方向的相邻的两个所述LED发光单元(20)的第二中心间距A2。
5.根据权利要求1所述的背光模组,其特征在于,所述多个LED发光单元(20)以矩阵的形式分布在所述基板(10)上。
6.根据权利要求1所述的背光模组,其特征在于,所述LED发光单元(20)在所述基板(10)上的投影呈圆形、椭圆形、长方形或正方形。
7.一种显示装置,其特征在于,包括间隔设置的背光模组(1)和光学模组(2),其中,所述背光模组(1)为权利要求1至6中任一项所述的背光模组,所述光学模组(2)包括光学部件层(201)和转化膜片层(202)和液晶玻璃层(203)。
8.根据权利要求7所述的显示装置,其特征在于,所述背光模组(1)和所述光学模组(2)之间的间隔距离大于等于1mm且小于等于12mm。
9.根据权利要求7所述的显示装置,其特征在于,所述光学部件层(201)包括扩散板、扩散膜和棱镜膜,所述转化膜片层(202)为荧光转化膜或量子点转化膜。
10.根据权利要求7所述的显示装置,其特征在于,所述显示装置的亮度大于等于250尼特且小于等于2000尼特。
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