WO2016183856A1 - 背光单元及具有该背光单元的显示装置 - Google Patents
背光单元及具有该背光单元的显示装置 Download PDFInfo
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- WO2016183856A1 WO2016183856A1 PCT/CN2015/079621 CN2015079621W WO2016183856A1 WO 2016183856 A1 WO2016183856 A1 WO 2016183856A1 CN 2015079621 W CN2015079621 W CN 2015079621W WO 2016183856 A1 WO2016183856 A1 WO 2016183856A1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V17/00—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages
- F21V17/10—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening
- F21V17/101—Fastening of component parts of lighting devices, e.g. shades, globes, refractors, reflectors, filters, screens, grids or protective cages characterised by specific fastening means or way of fastening permanently, e.g. welding, gluing or riveting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/02—Refractors for light sources of prismatic shape
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- the present invention relates to the field of display technologies, and in particular, to a backlight unit and a display device having the same.
- the optical film used in the design is also getting thinner and thinner, usually between 0.05 mm and 0.1 mm. Thinner diaphragms are easily deformed by heat and moisture during use, resulting in warpage or wavy wrinkles in the corresponding parts of the product, which seriously affects the display effect of the display device, and the user's impression of the product will be greatly reduced.
- the present invention provides a backlight unit and a display device having the same, wherein the optical film does not warp or deform due to heat or moisture during use of the product, thereby ensuring backlight and display effect.
- a backlight unit includes a backlight and an optical film disposed on a light-emitting surface of the backlight, the optical film being fully attached to a light-emitting surface of the backlight.
- the optical film is pasted on the backlight through a first optical adhesive layer.
- the bottom surface of the backlight is provided with a reflective sheet, and a second optical adhesive layer is disposed between the reflective sheet and the backlight.
- the optical film comprises a lower diffusion sheet layer, a first prism layer and a second prism layer disposed on the diffusion sheet layer from bottom to top, the diffusion sheet layer and the first prism layer A third optical adhesive layer is filled between the first prism layer and the second prism layer is filled with a fourth optical adhesive layer.
- the upper surface of the first prism layer is a sawtooth surface
- the fourth optical adhesive layer is filled in the sawtooth surface of the first prism layer.
- the lower surface of the first prism layer is a serrated surface
- the third optical adhesive layer is filled in the serrated surface of the first prism layer.
- the optical film further comprises at least one third prism layer disposed on the second prism layer, and the fifth prism layer and the third prism layer are filled with a fifth optical glue layer.
- the present invention also provides a display device including a display panel and the above-described backlight unit, the display panel being attached to the backlight unit by a light-shielding tape.
- the optical film of the invention is fully adhered to the light-emitting surface of the backlight unit, so that the optical film and the backlight unit form an integral structure, and the optical film can be firmly adhered even when the backlight unit generates high temperature during work or when the product is wet. No warping or deformation occurs, which improves the anti-deformation ability of the optical film, and ensures the light guiding effect and display effect. At the same time, since the optical film is filled with optical glue between the diffusion sheet layer and the prism layer, the scratch resistance of the optical film is remarkably improved.
- FIG. 1 is a schematic cross-sectional view showing a display device according to Embodiment 1 of the present invention.
- FIG. 2 is a cross-sectional structural view showing a display device according to Embodiment 2 of the present invention.
- FIG. 3 is a cross-sectional structural view showing a display device according to Embodiment 3 of the present invention.
- a display device of the present invention includes a backlight unit and a display panel 40.
- the display panel is attached to the backlight unit through a light-shielding tape K disposed on a non-display area around the bottom surface.
- the backlight unit includes a backlight 10 composed of a light guide plate and an LED light source, and an optical film 20 disposed on the light emitting surface of the backlight 10.
- the optical film 20 is completely adhered to the light emitting surface of the backlight 10, so that the two form a
- the optical film 20 can be reliably adhered to the light-emitting surface of the backlight 10, thereby avoiding the optical film 20 being emitted.
- the warpage or deformation affects the display device to perform normally.
- the optical film 20 is pasted on the backlight 10 through the first optical adhesive layer 1.
- the first optical adhesive layer 1 may be a light transmitting property of an organic silicone, an acrylic resin, an unsaturated polyester, a polyurethane, or an epoxy resin. Excellent adhesive material.
- the bottom surface of the backlight 10 is further provided with a reflective sheet 30, and the reflective sheet 30 is combined with the backlight 10 through the second optical adhesive layer 2.
- the optical film 20 includes a lower diffusion sheet layer 21, a first prism layer 22 and a second prism layer 23 which are sequentially disposed on the diffusion sheet layer 21 from bottom to top.
- the diffusion sheet layer 21 is composed of a diffusion sheet substrate 21a (such as PET, PC, PMMA, etc.) having a high light transmittance and a diffusion particle material added to the diffusion sheet substrate 21a.
- the diffusion sheet layer 21 is configured to uniformly concentrate the light incident on the backlight 10 to the first prism layer 22, and the first prism layer 22 is configured to convert the more divergent planar light into planar light with a relatively concentrated brightness, and the second The prism layer 23 can perform spectroscopic processing on the light incident on the first prism layer 22 to enhance light uniformity and brightness.
- the third optical adhesive layer 3 is filled between the diffusion sheet layer 21 and the first prism layer 22, which increases the overall strength of the optical film 20 and prevents the delamination of the optical film 20.
- the fourth optical layer 4 is filled between the first prism layer 22 and the second prism layer 23, and the multilayer composite structure of the optical film 20 is formed integrally, which can effectively protect the structure of the first prism layer 22 and enhance the thin optical film.
- the sheet 20 has resistance to deformation and, at the same time, its scratch resistance is correspondingly better.
- the upper surface of the first prism layer 22 of the embodiment is a sawtooth surface, and the fourth optical adhesive layer 4 is filled in the sawtooth surface of the first prism layer 22, thereby further improving the first prism layer 22 and the second prism layer 23.
- the strength of the bond is a sawtooth surface
- the lower surface of the first prism layer 22 of the present embodiment is a sawtooth surface, and the third optical adhesive layer 3 is filled in the sawtooth surface of the first prism layer 22.
- the first prism layer 22 of the present embodiment is better than the concentrating effect of the first embodiment, and the screen display brightness of the display device is further improved.
- the optical film 20 of the present embodiment further includes at least a third prism layer 24, a second prism layer 23 and a third prism layer 24 on the second prism layer 23.
- the fifth optical adhesive layer 5 is filled between them.
- the sawtooth surfaces of the second prism layer 23 and the third prism layer 24 of the present embodiment are both disposed on the upper surface, and the fifth optical adhesive layer 5 is filled between the sawtooth surface of the second prism layer 23 and the lower surface of the third prism layer 24.
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- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
一种背光单元及具备该背光单元的显示装置,包括背光源(10)和设于所述背光源(10)的出光面的光学膜片(20),所述光学膜片(20)全贴合于所述背光源(10)的出光面上,使光学膜片(20)与背光源(10)形成整体结构,即使工作过程中背光单元产生高温,或者产品受潮时光学膜片也能牢固贴合而不发生翘曲或变形,提高了光学膜片的抗变形能力,保证了导光效果和显示效果。同时,由于光学膜片的扩散片层与棱镜层之间采用光学胶填充,光学膜片的耐刮性能显著提升。
Description
本发明涉及显示技术领域,尤其涉及一种背光单元及具有该背光单元的显示装置。
随着移动消费电子产品的飞速发展,显示装置被广泛应用在电脑、手机和电视等产品中,消费者对于产品的要求也越来越高,不仅要求显示装置具有良好的使用性能,还要求其具有很薄的厚度。
由于产品的厚度越来越薄,使得在设计中所使用光学膜片也越来越薄,通常在0.05mm~0.1mm之间。较薄的膜片在使用时受热受潮很容易变形,从而导致产品的相应部位出现翘曲或形成波浪形褶皱,严重影响显示装置的显示效果,使用者对于产品的印象将大打折扣。
发明内容
鉴于现有技术存在的不足,本发明提供了一种背光单元及具有该背光单元的显示装置,其光学膜片不会因为产品使用过程中发热或受潮而发生翘曲或变形,保证了背光和显示效果。
为了实现上述的目的,本发明采用了如下的技术方案:
一种背光单元,包括背光源和设于所述背光源的出光面的光学膜片,所述光学膜片全贴合于所述背光源的出光面上。
其中,所述光学膜片通过第一光学胶层粘贴在所述背光源上。
其中,所述背光源的底面设有反射片,所述反射片与所述背光源之间设有第二光学胶层。
其中,所述光学膜片包括下层的扩散片层、自下而上依次设于所述扩散片层上的第一棱镜层和第二棱镜层,所述扩散片层与所述第一棱镜层之间填充有第三光学胶层,所述第一棱镜层和所述第二棱镜层之间填充有第四光学胶层。
其中,所述第一棱镜层的上表面为锯齿面,所述第四光学胶层填充于所述第一棱镜层的锯齿面内。
或者,所述第一棱镜层的下表面为锯齿面,所述第三光学胶层填充于所述第一棱镜层的锯齿面内。
或者,所述光学膜片还包括设于所述第二棱镜层上的至少一个第三棱镜层,所述第二棱镜层和所述第三棱镜层之间填充有第五光学胶层。
本发明还提供了一种显示装置,包括显示面板和上述的背光单元,所述显示面板通过遮光胶带粘贴于所述背光单元上。
本发明的光学膜片全贴合于背光单元的出光面上,使光学膜片与背光单元形成整体结构,即使工作过程中背光单元产生高温,或者产品受潮时光学膜片也能牢固贴合而不发生翘曲或变形,提高了光学膜片的抗变形能力,保证了导光效果和显示效果。同时,由于光学膜片的扩散片层与棱镜层之间采用光学胶填充,光学膜片的耐刮性能显著提升。
图1为本发明实施例1的显示装置的剖面结构示意图。
图2为本发明实施例2的显示装置的剖面结构示意图。
图3为本发明实施例3的显示装置的剖面结构示意图。
为了使本发明的目的、技术方案及优点更加清楚明白,以下结合附图及实施例,对本发明进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。
实施例1
参阅图1,本发明的显示装置包括背光单元和显示面板40,显示面板通过设于底面四周非显示区域的遮光胶带K粘贴于背光单元上。
背光单元包括由导光板与LED光源组成的背光源10和设于背光源10的出光面的光学膜片20,光学膜片20全贴合于背光源10的出光面上,使得二者形成一个整体,即使在背光单元工作过程中光学膜片20受高温作用或受潮的情况下,光学膜片20仍能可靠紧贴于背光源10的出光面上,避免了光学膜片20发
生翘曲或变形影响显示装置发挥正常性能。
具体地,光学膜片20通过第一光学胶层1粘贴在背光源10上,第一光学胶层1可以是有机硅胶、丙烯酸型树脂及不饱和聚酯、聚氨酯、环氧树脂等透光性能优良的胶粘剂材料。背光源10的底面还设有反射片30,反射片30与背光源10之间通过第二光学胶层2结合。
光学膜片20包括下层的扩散片层21、自下而上依次设于扩散片层21上的第一棱镜层22和第二棱镜层23。扩散片层21由光透过率高的扩散片基材21a(如PET、PC、PMMA等)和在扩散片基材21a上加入扩散粒子材料组成。扩散片层21用于将背光源10射入的光集中后均匀投射至第一棱镜层22,第一棱镜层22用于将较发散的平面光转化为亮度比较集中的平面光,而第二棱镜层23可对第一棱镜层22射入的光进行分光处理,增强出光均匀性和亮度。
扩散片层21与第一棱镜层22之间填充有第三光学胶层3,增大了光学膜片20整体强度并能避免光学膜片20发生分层现象。第一棱镜层22和第二棱镜层23之间填充有第四光学胶层4,光学膜片20的多层复合结构形成一个整体,可以有效保护第一棱镜层22的结构,提升薄型光学膜片20的抗变形能力,同时,其耐刮性能也相应更好。
本实施例的第一棱镜层22的上表面为锯齿面,第四光学胶层4填充于该第一棱镜层22的锯齿面内,进一步提高了第一棱镜层22与第二棱镜层23之间的结合强度。
实施例2
如图2所示,与实施例1不同的是,本实施例的第一棱镜层22的下表面为锯齿面,第三光学胶层3填充于第一棱镜层22的锯齿面内。本实施例的第一棱镜层22相比实施例1的聚光效果更好,显示装置的画面显示亮度进一步得以提升。
实施例3
如图3所示,与实施例1和2不同的是,本实施例的光学膜片20在第二棱镜层23上面还至少包括第三棱镜层24,第二棱镜层23和第三棱镜层24之间填充有第五光学胶层5。本实施例的第二棱镜层23和第三棱镜层24的锯齿面均设于上表面,第五光学胶层5填充于第二棱镜层23的锯齿面与第三棱镜层24下表面之间。通过增加光学膜片20中棱镜层的数量,本实施例的背光单元出光更
均匀,画面显示的一致性更好。
以上所述仅是本申请的具体实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本申请原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本申请的保护范围。
Claims (20)
- 一种背光单元,其中,包括背光源和设于所述背光源的出光面的光学膜片,所述光学膜片全贴合于所述背光源的出光面上。
- 根据权利要求1所述的背光单元,其中,所述光学膜片通过第一光学胶层粘贴在所述背光源上。
- 根据权利要求1所述的背光单元,其中,所述背光源的底面设有反射片,所述反射片与所述背光源之间设有第二光学胶层。
- 根据权利要求1所述的背光单元,其中,所述光学膜片包括下层的扩散片层、自下而上依次设于所述扩散片层上的第一棱镜层和第二棱镜层,所述扩散片层与所述第一棱镜层之间填充有第三光学胶层,所述第一棱镜层和所述第二棱镜层之间填充有第四光学胶层。
- 根据权利要求4所述的背光单元,其中,所述第一棱镜层的上表面为锯齿面,所述第四光学胶层填充于所述第一棱镜层的锯齿面内。
- 根据权利要求4所述的背光单元,其中,所述第一棱镜层的下表面为锯齿面,所述第三光学胶层填充于所述第一棱镜层的锯齿面内。
- 根据权利要求4所述的背光单元,其中,所述光学膜片还包括设于所述第二棱镜层上的至少一个第三棱镜层,所述第二棱镜层和所述第三棱镜层之间填充有第五光学胶层。
- 根据权利要求2所述的背光单元,其中,所述光学膜片包括下层的扩散片层、自下而上依次设于所述扩散片层上的第一棱镜层和第二棱镜层,所述扩散片层与所述第一棱镜层之间填充有第三光学胶层,所述第一棱镜层和所述第二棱镜层之间填充有第四光学胶层。
- 根据权利要求8所述的背光单元,其中,所述第一棱镜层的上表面为锯齿面,所述第四光学胶层填充于所述第一棱镜层的锯齿面内。
- 根据权利要求8所述的背光单元,其中,所述第一棱镜层的下表面为锯齿面,所述第三光学胶层填充于所述第一棱镜层的锯齿面内。
- 根据权利要求8所述的背光单元,其中,所述光学膜片还包括设于所述第二棱镜层上的至少一个第三棱镜层,所述第二棱镜层和所述第三棱镜层之 间填充有第五光学胶层。
- 根据权利要求3所述的背光单元,其中,所述光学膜片包括下层的扩散片层、自下而上依次设于所述扩散片层上的第一棱镜层和第二棱镜层,所述扩散片层与所述第一棱镜层之间填充有第三光学胶层,所述第一棱镜层和所述第二棱镜层之间填充有第四光学胶层。
- 根据权利要求12所述的背光单元,其中,所述第一棱镜层的上表面为锯齿面,所述第四光学胶层填充于所述第一棱镜层的锯齿面内。
- 根据权利要求12所述的背光单元,其中,所述第一棱镜层的下表面为锯齿面,所述第三光学胶层填充于所述第一棱镜层的锯齿面内。
- 根据权利要求12所述的背光单元,其中,所述光学膜片还包括设于所述第二棱镜层上的至少一个第三棱镜层,所述第二棱镜层和所述第三棱镜层之间填充有第五光学胶层。
- 一种显示装置,其中,包括显示面板和背光单元,所述显示面板通过遮光胶带粘贴于所述背光单元上;所述背光单元包括背光源和设于所述背光源的出光面的光学膜片,所述光学膜片全贴合于所述背光源的出光面上。
- 根据权利要求16所述的显示装置,其中,所述光学膜片包括下层的扩散片层、自下而上依次设于所述扩散片层上的第一棱镜层和第二棱镜层,所述扩散片层与所述第一棱镜层之间填充有第三光学胶层,所述第一棱镜层和所述第二棱镜层之间填充有第四光学胶层。
- 根据权利要求17所述的显示装置,其中,所述第一棱镜层的上表面为锯齿面,所述第四光学胶层填充于所述第一棱镜层的锯齿面内。
- 根据权利要求17所述的显示装置,其中,所述第一棱镜层的下表面为锯齿面,所述第三光学胶层填充于所述第一棱镜层的锯齿面内。
- 根据权利要求17所述的显示装置,其中,所述光学膜片还包括设于所述第二棱镜层上的至少一个第三棱镜层,所述第二棱镜层和所述第三棱镜层之间填充有第五光学胶层。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201510256818.4A CN104832841A (zh) | 2015-05-19 | 2015-05-19 | 背光单元及具有该背光单元的显示装置 |
CN201510256818.4 | 2015-05-19 |
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CN105042427B (zh) * | 2015-08-13 | 2017-05-17 | 武汉华星光电技术有限公司 | 一种背光模组及显示装置 |
CN105652457B (zh) * | 2016-04-11 | 2018-03-27 | 宁波维真显示科技股份有限公司 | 改善硬对硬全贴合翘曲的方法 |
CN108279459B (zh) | 2017-01-05 | 2019-12-24 | 京东方科技集团股份有限公司 | 显示模组及显示装置 |
CN114815394A (zh) * | 2018-09-06 | 2022-07-29 | 群创光电股份有限公司 | 显示装置 |
CN109975918A (zh) * | 2019-04-10 | 2019-07-05 | 深圳康佳电子科技有限公司 | 一种全贴合光学模块及液晶模组 |
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