WO2013131378A1 - 反射片及其制备方法、具有该反射片的背光源 - Google Patents
反射片及其制备方法、具有该反射片的背光源 Download PDFInfo
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- WO2013131378A1 WO2013131378A1 PCT/CN2012/084183 CN2012084183W WO2013131378A1 WO 2013131378 A1 WO2013131378 A1 WO 2013131378A1 CN 2012084183 W CN2012084183 W CN 2012084183W WO 2013131378 A1 WO2013131378 A1 WO 2013131378A1
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- light
- blue
- blue pigment
- layer
- reflective
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
Definitions
- the present invention relates to a reflective sheet, a method of fabricating the same, and a backlight having the reflective sheet. Background technique
- the backlight mainly includes a light source 3 and a light guide plate 2 , and the light source 3 may be an LED light bar, a cold cathode fluorescent tube (CCFL ), or the like.
- the light source 3 is disposed on one side of the light guide plate 2 (light incident surface 21 ). Further, the light emitted from the light source 3 enters the light guide plate 2 from the light incident surface 21, and then exits from the surface (light exit surface) of the light guide plate and enters the liquid crystal display module.
- a reflective dot can be formed on the bottom surface of the light guide plate 2 (the surface opposite to the light-emitting surface) by a screen printing process, and is disposed outside the light-emitting surface 21 and the light-emitting surface of the light guide plate 2.
- the other surface is provided with a white reflection sheet 1 or a silver reflection sheet 1 for reflecting the light propagating in the light guide plate 2 and incident on the surface of the light guide plate back to the inside of the light guide plate to prevent light leakage and improve light utilization efficiency.
- the above-mentioned reflection sheets may each include a light-reflecting layer for reflecting light and an adhesive layer for bonding the reflection sheet to the light guide plate.
- the reflective layer of the white reflective sheet is composed of a transparent resin material and a white pigment.
- the most commonly used transparent resin is PET (polyethylene terephthalate), but other aromatic polyester resins may also be used.
- the aliphatic polyester resin or the like, the white pigment is a mixture of one or more of titanium oxide particles and polytetrafluoroethylene particles; the reflective layer of the silver reflective sheet is usually vapor deposited metallic silver. Both of the above reflection sheets do not change the color of the reflected light.
- the printing ink of the reflective dots and the material of the light guide plate absorb more blue light
- the blue light is absorbed more, and the remaining light is yellowish.
- the greater the proportion of light reflected from the light exiting the light guide plate from the light entrance surface the greater the optical path that the light passes through. Long, the blue light is absorbed more, so the light emitted from the far end of the light guide plate (the end far from the light incident surface) is more yellowish; in short, the existing backlight has a large color shift, which affects the display quality.
- the technical solution disclosed by the present invention provides a reflection sheet capable of solving the color shift problem in view of the problem that the backlight has a large color shift in the prior art.
- a reflective sheet according to an embodiment of the present invention includes a light reflecting layer for reflecting light, and the reflective sheet is blue.
- the reflective layer is blue.
- the light-reflecting layer contains a blue pigment having a mass percentage of 1% to 30%.
- the reflective sheet further includes an adhesive layer, and the adhesive layer is blue.
- the binder layer contains a blue pigment in a percentage by mass of 1% to 20%.
- the reflective layer and/or the adhesive layer are blue, so that the reflective sheet is blue.
- the technical solution disclosed by the present invention provides a backlight capable of solving the color shift problem in view of the problem that the backlight has a large color shift in the prior art.
- a backlight according to an embodiment of the invention includes a light guide plate, and the light guide plate is provided with the above-mentioned reflection sheet.
- the technical solution disclosed by the present invention further provides a method for preparing a reflective sheet which can solve the color shift problem.
- a method of producing a reflective sheet according to an embodiment of the present invention comprises: mixing a blue pigment into a raw material of a light-reflecting layer; and forming a light-reflecting layer from the raw material of the light-reflecting layer mixed with the blue pigment.
- the mass percentage of the blue pigment is from 1% to 20%.
- a method of preparing a reflective sheet according to another embodiment of the present invention comprises: mixing a blue pigment into a binder; and coating a binder mixed with a blue pigment on the reflective layer of the reflective sheet to form a binder Floor.
- the mass percentage of the blue pigment is from 1% to 30%.
- FIG. 1 is a schematic structural view of a conventional backlight using a side light-introducing light guide
- Fig. 2 is a schematic structural view of a reflection sheet according to Embodiment 3 of the present invention. detailed description
- the reflection sheet is blue
- the reflection sheet is blue under natural light, that is, the light emitted from the reflection sheet under natural light is blue light (wavelength is 450 to 500 nm);
- blue pigment The meaning also means that the pigment is blue under natural light.
- the reflective layer or the reflective layer material may be PET, or other reflective polyester materials such as aromatic polyester resin and aliphatic polyester resin;
- the blue pigment may be CI Pigment Blue 60, Any blue pigment such as C ⁇ Pigment Blue 27, CI Pigment Blue 61, C ⁇ Pigment Blue 29, CI Pigment Blue 17, CI Pigment Blue 9, etc.;
- the binder may be an acrylic binder or a polyacrylic binder.
- This embodiment provides a reflection sheet including a light-reflecting layer for reflecting light, and the reflection sheet is blue.
- the reflection sheet of this embodiment is blue, and the absorption ability to blue light is weak, and the light of the remaining colors is (such as yellow light), the absorption capacity is strong, and the proportion of blue light in the light reflected by the light is increased. Therefore, when the reflective sheet of the embodiment is attached to the light guide plate, it can increase the proportion of blue light in the emitted light. The color shift is improved (the color shift can be reduced by 1 to 20%.); Moreover, the light emitted from the high beam end of the light guide plate is more severely colored, and the reflection sheet of the embodiment just makes the light emitted from the far end.
- the increase of blue light is more (because the proportion of light reflected from the far-end end is more), which fully meets the needs of the backlight; at the same time, the reflection sheet of this embodiment can allow part of the original light to be double-sided only.
- the backlight uses a single-sided light source to save energy and materials.
- This embodiment provides a reflection sheet including a light-reflecting layer for reflecting light, and the light-reflecting layer is blue.
- the reflective layer for reflecting light in the reflective sheet of the embodiment is blue, so that the reflective sheet is blue; of course, as described above, the main material of the reflective layer may be a reflective layer material such as PET.
- the blue pigment may be a blue pigment such as CI Pigment Blue 60.
- the reflective layer contains a blue pigment having a mass percentage of 1% to 20%. That is, the reflective layer of the reflective sheet of the present embodiment is blue by mixing the blue pigment, and the content of the blue pigment is preferably from 1 to 20% by weight (wt%: mass%); Within the range, that is, without affecting the reflective ability of the reflective layer, the reflective layer can be colored.
- the present embodiment provides a reflective sheet 1 comprising a light reflecting layer 11 for reflecting light, further comprising an adhesive layer 12, which is blue.
- the adhesive layer 12 for bonding the reflective sheet 1 to the light guide plate in the reflective sheet 1 of the present embodiment is blue, so that the reflective sheet 1 is blue; of course, the adhesive
- the main material of the layer 12 may be a binder such as an acrylic binder, and the blue pigment may be a blue pigment such as CI Pigment Blue 60.
- the advantage of making the adhesive layer 12 blue is that the adhesive layer 12 is not changed to the reflective sheet 1 The reflection ability is affected to ensure that the reflection effect is not lowered. Meanwhile, for the reflection sheet 1 having the metal reflection layer 11, it is difficult to make the reflection layer 11 blue, and it is easy to make the adhesive layer 12 blue. achieve.
- the binder layer 12 contains a blue pigment in a percentage by mass of 1% to 30%. That is, the adhesive layer 12 of the reflective sheet 1 of the present embodiment is blue by mixing the blue pigment, and the content of the blue pigment is preferably from 1 to 30% by weight, since it has been found by practice that within this content range, That is, the adhesive layer 12 is colored, without affecting the adhesive ability of the adhesive layer 12.
- the upper limit of the blue pigment content in the binder layer 12 is 30% by weight, which is larger than the upper limit (20% by weight) of the blue pigment content in the light-reflecting layer 11, because the adhesive layer 12 functions to reflect the sheet 1 and the light guide plate. Bonding, a large pigment content will not affect its bonding ability.
- the reflective sheet of this embodiment must also include a light reflecting layer 11 which may be a conventional light reflecting layer 11 which does not contain a blue pigment, or may be a blue light reflecting layer 11 in Embodiment 2 (ie, a reflective sheet).
- the light reflecting layer 11 and the adhesive layer 12 may all be blue).
- the embodiment provides a backlight including a light guide plate on which a reflection sheet according to an embodiment of the present invention is provided.
- the light guide plate in the backlight of the embodiment is a side light-introducing light guide plate, that is, the light source is disposed outside one side surface of the light guide plate (or the light incident surface is a side surface of the light guide plate).
- the bottom surface of the light guide plate (the surface opposite to the light-emitting surface) is printed with a reflection dot.
- the reflective sheet may be disposed at different positions of the light guide plate according to specific requirements: for example, it may be disposed on the other three sides of the light guide plate except the light surface (ie, the side reflection sheet); or may be disposed on the light guide plate.
- the bottom surface ie, the bottom surface has both reflective dots and reflective sheets); it may also be provided only on a part of the side or bottom surface of the light guide plate, and the like.
- the backlight of this embodiment may also include other components in other backlights, such as a light source, a back panel, a frame, and the like.
- the light guide plate of the backlight of the embodiment is provided with the above-mentioned reflection sheet, it can improve the color shift phenomenon, improve the display quality, and save energy and materials.
- Table 1 Comparison of illuminance chromaticity effects between the existing backlight and the backlight of the present invention
- Table 1 is a comparison table of illuminance chromatic effects of the existing backlight and the backlight of the present invention; wherein, "the existing backlight” refers to a backlight of the existing side-input light-guided light guide plate, which is removed from the light surface.
- the three sides of the present invention are affixed with a conventional white reflection sheet;
- the backlight 1 of the present invention is a replacement of all the side reflection sheets of the light guide plate of the existing backlight with the reflection sheet of the embodiment 3 (only 15 wt% in the adhesive layer) a backlight formed by the blue pigment;
- the backlight 2 of the present invention is a replacement of all the side reflection sheets of the light guide plate of the conventional backlight with the reflection sheet of the embodiment 2 (only 10 wt% of the blue pigment in the reflective layer)
- the color shift is a value calculated from the difference between x and y and the standard value.
- the nine sampling points indicate the nine different positions on the light-emitting surface of the backlight.
- the specific position is According to the model of the backlight, it is scheduled at the factory, usually eight other than the sampling point 5.
- the connection points of the sampling points are surrounded by a rectangle slightly smaller than the light-emitting surface of the backlight, and the sampling point 5 is the midpoint of the light-emitting surface of the backlight.
- the color shift value of the backlight of the present invention is significantly smaller than that of the existing backlight.
- Table 2 Comparison of the brightness of the existing backlight and the backlight of the present invention
- Example 2 is a comparison table of luminous luminance effects of a conventional backlight and a backlight according to an embodiment of the present invention, wherein the luminance unit is cd/m 2 (candela per square meter), and the brightness of the backlight according to an embodiment of the present invention can be seen. It is equivalent to the brightness of the existing backlight, and can fully meet the actual needs.
- Example 5
- This embodiment provides a method for preparing a reflective sheet, which includes:
- step S01 a blue pigment is mixed into the raw material of the light reflecting layer.
- the reflective layer material may be PET (preferably foamed PET), or may be other reflective layer materials such as aromatic polyester resin or aliphatic polyester resin; blue pigment may be blue pigment such as CI pigment blue 60; .
- Step S02 forming a light-reflecting layer with a light-reflecting layer raw material mixed with a blue pigment.
- the blue pigment has a mass percentage of 1% to 20%.
- the step of forming the light reflecting layer can be achieved by an existing process such as film stretching. If the layer material is mixed with a blue pigment, the prior art reflective layer material is mixed with a white pigment such as titanium oxide or polytetrafluoroethylene.
- the method of this embodiment may further include other common steps in the preparation process of the reflective sheet, such as a step of forming a base layer, a step of forming a protective layer, a step of coating an adhesive, a step of attaching a release paper, and a reflective sheet.
- the step of cutting the block, etc. can be implemented using existing processes. Since the method for preparing a reflective sheet according to the present embodiment includes the step of mixing a blue pigment into the raw material of the light reflecting layer, the reflective sheet prepared by the method is blue, which can improve the color shift phenomenon, improve the display quality, and save energy and material.
- the present embodiment provides a method for preparing a reflective sheet, which is similar to the method for preparing the reflective sheet of Example 5, except that the content of the blue pigment in the reflective layer raw material mixed with the blue pigment is 1 wt%; The content of the blue pigment in the light-reflecting layer of the obtained reflection sheet was also 1 wt%.
- Example 7
- the present embodiment provides a method for preparing a reflective sheet, which is similar to the method for preparing the reflective sheet of Example 5, except that the content of the blue pigment in the reflective layer raw material mixed with the blue pigment is 10% by weight; The content of the blue pigment in the light-reflecting layer of the obtained reflection sheet was also 10% by weight.
- Example 8
- the present embodiment provides a method for preparing a reflective sheet, which is similar to the method for preparing the reflective sheet of Example 5, except that the content of the blue pigment in the reflective layer raw material mixed with the blue pigment is 20% by weight; The content of the blue pigment in the light-reflecting layer of the obtained reflection sheet was also 20% by weight.
- Example 9
- This embodiment provides a method for preparing a reflective sheet, which includes:
- Step S11 mixing a blue pigment into the binder.
- the binder may be a binder such as an acrylic binder; and the blue pigment may be a blue pigment such as C.I. Pigment Blue 60.
- step S12 a binder mixed with a blue pigment is coated on the light reflecting layer of the reflective sheet to form a binder layer.
- the mass percentage of the blue pigment is from 1% to 30%.
- the step of coating to form a binder can also be achieved by a conventional process such as transfer coating. If a conventional process is used, the main difference between the method according to the present embodiment and the conventional process is that the binder used is mixed with a blue pigment.
- the method of the embodiment may further include other common steps in the preparation process of the reflective sheet, such as a step of forming a base layer, a step of forming a reflective layer (an existing reflective layer may be formed, or may be according to an embodiment)
- the method of 5 forms a blue reflective layer), the step of forming a protective layer, the step of attaching a release paper, and the step of cutting a reflective sheet. These steps can be implemented using existing processes.
- the method for producing a reflective sheet according to the present embodiment includes the step of mixing a blue pigment into the adhesive layer, the reflective sheet prepared by the method is blue, which can improve the color shift phenomenon, improve the display quality, and save energy. And materials.
- the present embodiment provides a method for preparing a reflective sheet, which is similar to the method for preparing the reflective sheet of Example 9, except that the content of the blue pigment in the binder mixed with the blue pigment is 1 wt%; The content of the blue pigment in the binder layer of the obtained reflection sheet was also 1 wt%.
- Example 11
- the present embodiment provides a method for preparing a reflective sheet, which is similar to the method for preparing the reflective sheet of Example 9, except that the content of the blue pigment in the binder mixed with the blue pigment is 15% by weight; The content of the blue pigment in the binder layer of the obtained reflection sheet was also 15% by weight.
- Example 12
- the present embodiment provides a method for preparing a reflective sheet, which is similar to the method for preparing the reflective sheet of Example 9, except that the content of the blue pigment in the binder mixed with the blue pigment is 30% by weight; The content of the blue pigment in the binder layer of the obtained reflection sheet was also 30% by weight.
- the reflection sheet according to the embodiment of the present invention is blue, has a weak absorption ability for blue light, and has a strong absorption ability for light of other colors (such as yellow light), and the proportion of blue light reflected by the light is increased, so when When the reflective sheet according to the embodiment of the present invention is attached to the light guide plate, the proportion of the blue light in the emitted light can be increased, and the color shift is improved.
- the reflective sheet according to the embodiment of the present invention can allow a portion of the backlight that can only be double-sided into the light to be unilaterally lighted, saving energy and materials.
- the light guide plate of the backlight according to the embodiment of the present invention is provided with the above-mentioned reflection sheet, so that it can be Improve color shift, improve display quality, save energy and materials.
- the method for preparing a reflective sheet according to the embodiment of the present invention includes the step of mixing a blue pigment into the reflective layer material or the binder, the reflective sheet prepared by the method is blue, which can improve the color shift phenomenon and improve the display. Quality, energy saving and materials.
- the technique disclosed in the present invention is applicable to a backlight of a liquid crystal display device, for example, a backlight for using a side-into-light type light guide plate.
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Abstract
一种反射片（1），为蓝色，并具有用于反射光的反光层（11）。一种背光源，可用于液晶显示装置，尤其是用于使用侧入光式导光板的背光源，包括导光板，导光板上设有反射片。一种反射片的制备方法，包括向反光层原料或粘结剂（12）中添加蓝色颜料的步骤。反射片及具有反射片的背光源，属于液晶显示技术领域，可解决现有背光源存在较大色偏的问题。
Description
反射片及其制备方法、 具有该反射片的背光源 技术领域
本发明涉及一种反射片及其制备方法、 具有该反射片的背光源。 背景技术
背光源是液晶显示装置的重要组件， 在各种背光源中， 使用侧入光式 导光板的背光源是较常见的。如图 1所示， 背光源主要包括光源 3和导光板 2, 光源 3可以是 LED灯条、 冷阴极荧光管 （CCFL )等， 光源 3设在导光 板 2的一个侧面（入光面 21 )夕卜， 光源 3发出的光从入光面 21进入导光板 2后从导光板上表面（出光面）射出并进入液晶显示模组。 为了更充分的利 用光源 3发出的光， 可在导光板 2底面（与出光面相对的面）通过丝网印刷 工艺形成反射网点， 并在导光板 2的除入光面 21和出光面外的其它各面设 置白反射片 1或银反射片 1 ,用于将在导光板 2内传播并射到导光板表面的 光线反射回导光板内部， 防止漏光， 提高光利用率。
上述的反射片均可包括用于反射光的反光层和用于将反射片粘结在导 光板上的粘结剂层。其中， 白反射片的反光层由透明树脂材料和白色颜料组 成， 最常用的透明树脂为 PET (聚对苯二曱酸乙二醇酯）， 但也可釆用其它 的芳香族聚酯树脂、脂肪族聚酯类树脂等， 白色颜料为氧化钛粒子、 聚四氟 乙烯粒子等物质中的一种或几种的混合物；银反射片的反光层通常为蒸镀的 金属银。 上述两种反射片均不会改变其反射光的颜色。
由于反射网点的印刷油墨和导光板材料（通常为聚曱基丙烯酸曱酯） 都会更多的吸收蓝光， 因此从导光板射出的光会偏黄（背光源中的白光由蓝 光和黄光混合而成， 蓝光被吸收的多， 剩余的光就偏黄）， 尤其是， 从距入 光面越远处射出导光板的光中经反射的光的比例越大，且光经过的光程也越 长， 其蓝光被吸收的更多， 因此从导光板远光端（远离入光面的端）射出的 光更加偏黄； 总之， 现有的背光源存在较大的色偏， 影响显示质量。 而为了 避免色偏， 部分背光源 （尤其是大尺寸背光源） 必须釆取双侧入光的方式， 即导光板的两个相对侧面处分别设置光源 （即有两个入光面）， 而这会增大 材料和能量的耗费。
发明内容
本发明所公开的技术方案， 针对现有技术中背光源存在较大色偏的问 题， 提供了一种可解决色偏问题的反射片。
根据本发明实施例的反射片， 其包括用于反射光的反光层， 且所述反 射片为蓝色。
在该反射片中， 例如， 反光层为蓝色。
在该反射片中， 例如， 所述反光层中含有质量百分比为 1%至 30%的蓝 色颜料。
在该反射片中， 例如， 所述反射片还包括粘结剂层， 所述粘结剂层为 蓝色。
在该反射片中， 例如， 所述粘结剂层中含有质量百分比为 1%至 20%的 蓝色颜料。
也就是说， 根据本发明实施例的反射片， 反光层和 /或粘结剂层为蓝色， 从而使反射片为蓝色。
本发明所公开的技术方案， 针对现有技术中背光源存在较大色偏的问 题， 还提供了一种可解决色偏问题的背光源。
根据本发明实施例的背光源， 其包括导光板， 所述导光板上设有上述 的反射片。
本发明所公开的技术方案进一步提供了一种可解决色偏问题的反射片 的制备方法。
根据本发明一种实施方式的反射片的制备方法， 包括： 向反光层原料 中混入蓝色颜料； 用所述混有蓝色颜料的反光层原料形成反光层。
在该制备方法中， 例如， 在所述混有蓝色颜料的反光层原料中， 蓝色 颜料的质量百分比为 1%至 20%。
根据本发明另一种实施方式的反射片的制备方法， 包括： 向粘结剂中 混入蓝色颜料；将混有蓝色颜料的粘结剂涂布在反射片的反光层上形成粘结 剂层。
在该制备方法中， 例如， 在所述混有蓝色颜料的粘结剂中， 蓝色颜料 的质量百分比为 1%至 30%。
附图说明
为了更清楚地说明本发明实施例的技术方案， 下面将对实施例的附图 作简单地介绍，显而易见地，下面描述中的附图仅仅涉及本发明的一些实施 例， 而非对本发明的限制。
图 1为现有的使用侧入光式导光板的背光源的结构示意图；
图 2为本发明实施例 3的反射片的结构示意图。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚， 下面将结合本 发明实施例的附图，对本发明实施例的技术方案进行清楚、 完整地描述。显 然， 所描述的实施例是本发明的一部分实施例， 而不是全部的实施例。基于 所描述的本发明的实施例，本领域普通技术人员在无需创造性劳动的前提下 所获得的所有其他实施例， 都属于本发明保护的范围。
除非另作定义， 此处使用的技术术语或者科学术语应当为本发明所属 领域内具有一般技能的人士所理解的通常意义。本发明专利申请说明书以及 权利要求书中使用的 "第一"、 "第二" 以及类似的词语并不表示任何顺序、 数量或者重要性，而只是用来区分不同的组成部分。同样， "一个 "或者 "一" 等类似词语也不表示数量限制， 而是表示存在至少一个。
在本发明的实施例中， "反射片为蓝色" 是指在自然光下反射片为蓝 色， 即在自然光下反射片射出的光为蓝光（波长在 450 ~ 500nm ); "蓝色颜 料" 的含义也是指在自然光下颜料为蓝色。
在本发明的实施例中， 反光层或反光层原料可为 PET, 也可为其它的 芳香族聚酯树脂、 脂肪族聚酯类树脂等反光层材料； 蓝色颜料可为 C.I.颜料 蓝 60、 C丄颜料蓝 27、 C.I.颜料蓝 61、 C丄颜料蓝 29、 C.I.颜料蓝 17、 C.I. 颜料蓝 9 等任何蓝色颜料； 粘结剂可为丙烯酸类粘结剂或聚丙烯酸类粘结 剂。 实施例 1:
本实施例提供了一种反射片， 其包括用于反射光的反光层， 且该反射 片为蓝色。
本实施例的反射片为蓝色， 对蓝光的吸收能力较弱， 对其余颜色的光
(如黄光）吸收能力较强， 经其反射的光中蓝光的比例增大， 因此当把本实 施例的反射片贴到导光板上时，其可提高射出的光中蓝光所占的比例，改善 色偏（可减小色偏 1~20%。 ); 而且， 从导光板远光端射出的光原本色偏比较 严重， 而本实施例的反射片正好使从远光端射出的光中蓝光增加的更多（因 为从远光端射出的光中反射光的比例较多）， 完全符合背光源的需要； 同时， 本实施例的反射片可允许部分原来只能双侧入光的背光源釆用单侧入光的 方式， 节约能量和材料。 实施例 2:
本实施例提供了一种反射片， 其包括用于反射光的反光层， 且该反光 层为蓝色。
也就是说， 本实施例的反射片中用于反射光的反光层是蓝色的， 从而 使反射片为蓝色； 当然， 如前所述， 该反光层主要材料可为 PET等反光层 材料， 而蓝色颜料可为 C.I.颜料蓝 60等蓝色颜料。
例如， 反光层中含有质量百分比为 1%至 20%的蓝色颜料。 也就是说， 本实施例的反射片的反光层通过混入蓝色颜料呈蓝色，且蓝色颜料的含量优 选为 l~20wt% ( wt%: 质量百分比）； 因为经实践发现， 在这个含量范围内， 即不影响反光层的反射能力， 又能使反光层具有颜色。 于支撑反光层的基体层、用于保护反光层的保护层、用于将反射片粘结在导 光板上的粘结剂层、用于贴在粘结剂层上以防止意外粘结的离型纸等。可釆 用现有技术来实现这些结构。 实施例 3:
如图 2所示， 本实施例提供了一种反射片 1 , 其包括用于反射光的反光 层 11 , 还包括粘结剂层 12, 该粘结剂层 12为蓝色。
也就是说， 本实施例的反射片 1 中用于将反射片 1粘结在导光板上的 粘结剂层 12是蓝色的，从而使反射片 1为蓝色； 当然， 该粘结剂层 12的主 要材料可为丙烯酸类粘结剂等粘结剂， 而蓝色颜料可为 C.I.颜料蓝 60等蓝 色颜料。
使粘结剂层 12为蓝色的优点在于： 改变粘结剂层 12不会对反射片 1
的反射能力造成影响， 可保证其反射效果不降低； 同时，对于具有金属反光 层 11的反射片 1 , 使反光层 11成为蓝色比较困难， 而使粘结剂层 12为蓝 色则简单易实现。
例如， 粘结剂层 12中含有质量百分比为 1%至 30%的蓝色颜料。 也就 是说， 本实施例的反射片 1的粘结剂层 12通过混入蓝色颜料呈蓝色， 且蓝 色颜料的含量优选为 l~30wt%, 因为经实践发现， 在这个含量范围内， 即 不影响粘结剂层 12的粘结能力， 又能使粘结剂层 12具有颜色。 粘结剂层 12中蓝色颜料含量的上限为 30wt%, 大于反光层 11中蓝色颜料含量的上限 ( 20wt% ), 这是因为粘结剂层 12的作用是将反射片 1与导光板粘结， 颜料 含量较大也不会影响其粘结能力。
本实施例的反射片中也必须包括反光层 11 , 该反光层 11可为不含蓝色 颜料的常规反光层 11 , 也可为实施例 2中的蓝色的反光层 11 (即反射片的 反光层 11、 粘结剂层 12可都为蓝色）。 反光层的基体层、用于保护反光层的保护层、用于贴在粘结剂层上以防止意 外粘结的离型纸等。 可釆用现有技术来实现这些结构。 实施例 4:
本实施例提供了一种背光源， 其包括导光板， 导光板上设有根据本发 明实施例的反射片。
例如， 本实施例的背光源中的导光板为侧入光式导光板， 即光源设在 导光板的一个侧面外 （或者说入光面为导光板的侧面）。
再例如， 导光板的底面 （与出光面相对的表面） 印刷有反射网点。 上述反射片可根据具体需求设在导光板的不同位置： 例如， 其可设在 导光板的除入光面外的其它三个侧面上（即为侧反射片）； 也可设在导光板 的底面上（即底面同时具有反射网点和反射片）； 也可只设在导光板的部分 侧面或底面的一部分上， 等等。
本实施例的背光源中还可包括其它背光源中的常用部件， 如光源、 背 板、 框架等。
由于本实施例的背光源的导光板上设有上述反射片， 因此其可改善色 偏现象， 提高显示质量， 节约能量和材料。
表 1 现有背光源和本发明背光源的发光色度效果对比
从表 1中可见， 本发明背光源的色偏值明显比现有背光源的色偏小。
表 2 现有背光源和本发明背光源的发光亮度对比
本实施例提供了一种反射片的制备方法， 其包括：
步骤 S01 , 向反光层原料中混入蓝色颜料。
其中， 反光层原料可为 PET (优选发泡 PET ), 也可为其它的芳香族聚 酯树脂、 脂肪族聚酯类树脂等反光层材料； 蓝色颜料可为 C.I.颜料蓝 60等 蓝色颜料。
步骤 S02, 用混有蓝色颜料的反光层原料形成反光层。
例如， 在混有蓝色颜料的反光层原料中， 蓝色颜料的质量百分比为 1% 至 20%。
其中， 形成反光层的步骤可通过薄膜拉伸等现有工艺实现。 如果使用 层原料中混有蓝色颜料， 而现有技术的反光层原料中混有氧化钛、聚四氟乙 烯等白色颜料。
本实施例的方法还可包括反射片制备工艺中的其它常用步骤， 如形成 基体层的步骤、形成保护层的步骤、涂布粘结剂的步骤、贴附离型纸的步骤、 对反射片块材进行裁切的步骤等。 可釆用现有工艺来实现这些步骤。
由于在根据本实施例的反射片的制备方法中， 包括向反光层原料中混 入蓝色颜料的步骤， 因此其制备的反射片为蓝色， 可改善色偏现象， 提高显 示质量， 节约能量和材料。 实施例 6:
本实施例提供了一种反射片的制备方法， 其与实施例 5 的反射片的制 备方法类似， 区别在于其混有蓝色颜料的反光层原料中蓝色颜料的含量为 lwt%; 由其制得的反射片的反光层中蓝色颜料的含量也为 lwt%。 实施例 7:
本实施例提供了一种反射片的制备方法， 其与实施例 5 的反射片的制 备方法类似， 区别在于其混有蓝色颜料的反光层原料中蓝色颜料的含量为 10wt%; 由其制得的反射片的反光层中蓝色颜料的含量也为 10wt%。 实施例 8:
本实施例提供了一种反射片的制备方法， 其与实施例 5 的反射片的制 备方法类似， 区别在于其混有蓝色颜料的反光层原料中蓝色颜料的含量为 20wt%; 由其制得的反射片的反光层中蓝色颜料的含量也为 20wt%。 实施例 9:
本实施例提供了一种反射片的制备方法， 其包括：
步骤 S11 , 向粘结剂中混入蓝色颜料。
其中， 粘结剂可为丙烯酸类粘结剂等粘结剂； 而蓝色颜料可为 C.I.颜料 蓝 60等蓝色颜料。
步骤 S12,将混有蓝色颜料的粘结剂涂布在反射片的反光层上形成粘结 剂层。
例如， 在混有蓝色颜料的粘结剂中， 蓝色颜料的质量百分比为 1%至 30%。
其中， 涂布形成粘结剂的步骤也可通过转涂等常规的工艺实现。 如果 使用常规工艺，根据本实施例的方法与常规工艺的主要区别在于所用的粘结 剂中混有蓝色颜料。
本实施例的方法中还可包括反射片制备工艺中的其它常用步骤， 如形 成基体层的步骤、 形成反光层的步骤（可形成现有的反光层， 也可按实施例
5 的方法形成蓝色反光层）、 形成保护层的步骤、 贴附离型纸的步骤、 对反 射片块材进行裁切的步骤等。 可釆用现有工艺来实现这些步骤。
由于在根据本实施例的反射片的制备方法中， 包括向粘结剂层中混入 蓝色颜料的步骤， 因此其制备的反射片为蓝色， 可改善色偏现象，提高显示 质量， 节约能量和材料。 实施例 10:
本实施例提供了一种反射片的制备方法， 其与实施例 9 的反射片的制 备方法类似，区别在于其混有蓝色颜料的粘结剂中蓝色颜料的含量为 lwt%； 由其制得的反射片的粘结剂层中蓝色颜料的含量也为 lwt%。 实施例 11 :
本实施例提供了一种反射片的制备方法， 其与实施例 9 的反射片的制 备方法类似， 区别在于其混有蓝色颜料的粘结剂中蓝色颜料的含量为 15wt%; 由其制得的反射片的粘结剂层中蓝色颜料的含量也为 15wt%。 实施例 12:
本实施例提供了一种反射片的制备方法， 其与实施例 9 的反射片的制 备方法类似， 区别在于其混有蓝色颜料的粘结剂中蓝色颜料的含量为 30wt%; 由其制得的反射片的粘结剂层中蓝色颜料的含量也为 30wt%。 根据本发明实施例的反射片为蓝色， 对蓝光的吸收能力较弱， 对其余 颜色的光（如黄光）吸收能力较强， 经其反射的光中蓝光的比例增大， 因此 当把根据本发明实施例的反射片贴到导光板上时，其可提高射出的光中蓝光 所占的比例，改善色偏；而且，从导光板远光端射出的光原本色偏比较严重， 完全符合背光源的需要； 同时，根据本发明实施例的反射片可允许部分原来 只能双侧入光的背光源釆用单侧入光的方式， 节约能量和材料。
根据本发明实施例的背光源的导光板上设有上述的反射片， 因此其可
改善色偏现象， 提高显示质量， 节约能量和材料。
由于根据本发明实施例的反射片的制备方法中， 包括了向反光层原料 或粘结剂中混入蓝色颜料的步骤， 因此其制备的反射片为蓝色，可改善色偏 现象， 提高显示质量， 节约能量和材料。
本发明所公开的技术适用于液晶显示装置的背光源， 例如， 用于使用 侧入光式导光板的背光源。
以上所述仅是本发明的示范性实施方式， 而非用于限制本发明的保护 范围， 本发明的保护范围由所附的权利要求确定。
Claims
1. 一种反射片， 包括用于反射光的反光层， 其中， 所述反射片为蓝色。
2. 根据权利要求 1所述的反射片， 其中， 所述反光层为蓝色。
3. 根据权利要求 2所述的反射片， 其中， 所述反光层中含有质量百分 比为 1%至 20%的蓝色颜料。
4. 根据权利要求 1至 3中任意一项所述的反射片， 其中， 所述反射片 还包括粘结剂层， 所述粘结剂层为蓝色。
5. 根据权利要求 4所述的反射片， 其中， 所述粘结剂层中含有质量百 分比为 1%至 30%的蓝色颜料。
6. 一种背光源， 包括导光板， 其中， 所述导光板上设有权利要求 1至 5中任意一项所述的反射片。
7. 一种反射片的制备方法， 其中， 包括：
向反光层原料中混入蓝色颜料；
用所述混有蓝色颜料的反光层原料形成反光层。
8. 根据权利要求 7所述的反射片的制备方法， 其中， 在所述混有蓝色 颜料的反光层原料中， 蓝色颜料的质量百分比为 1%至 20%。
9. 一种反射片的制备方法， 其中， 包括：
向粘结剂中混入蓝色颜料；
将混有蓝色颜料的粘结剂涂布在反射片的反光层上形成粘结剂层。
10. 根据权利要求 9所述的反射片的制备方法，其中，在所述混有蓝色 颜料的粘结剂中， 蓝色颜料的质量百分比为 1%至 30%。
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| CN111752041B (zh) * | 2020-07-08 | 2022-09-09 | 京东方科技集团股份有限公司 | mini-LED灯板制备方法及反射结构 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101165561A (zh) * | 2006-10-18 | 2008-04-23 | 群康科技(深圳)有限公司 | 背光模组及液晶显示装置 |
| JP2008158034A (ja) * | 2006-12-21 | 2008-07-10 | Toppan Printing Co Ltd | 光学シートとそれを用いたバックライト・ユニットおよびディスプレイ |
| JP2009105025A (ja) * | 2007-10-04 | 2009-05-14 | Hitachi Chem Co Ltd | 導光体及び導光体を用いた面光源装置 |
| CN101630032A (zh) * | 2009-08-06 | 2010-01-20 | 长兴化学工业股份有限公司 | 反射式偏光片 |
| JP2010218972A (ja) * | 2009-03-18 | 2010-09-30 | Minebea Co Ltd | 面状照明装置 |
| CN101230970B (zh) * | 2007-01-22 | 2010-12-08 | 阿尔卑斯电气株式会社 | 照明单元 |
| CN102650706A (zh) * | 2012-03-09 | 2012-08-29 | 京东方科技集团股份有限公司 | 反射片及其制备方法、具有该反射片的背光源 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1892341A (zh) * | 2005-07-09 | 2007-01-10 | 群康科技(深圳)有限公司 | 导光板和采用该导光板的背光模组及液晶显示器 |
| CN101430454B (zh) * | 2007-11-07 | 2010-12-22 | 群康科技(深圳)有限公司 | 背光模组及液晶显示装置 |
| JP2010134269A (ja) * | 2008-12-05 | 2010-06-17 | Sharp Corp | 液晶表示装置 |
| CN102147100A (zh) * | 2010-02-08 | 2011-08-10 | 台湾百和工业股份有限公司 | 反光片及包含此反光片的液晶显示装置 |
| CN201926771U (zh) * | 2010-12-29 | 2011-08-10 | 盛玉林 | 多层反射片 |
| CN201917675U (zh) * | 2011-01-27 | 2011-08-03 | 昆山市诚泰电气股份有限公司 | 反射片 |
-
2012
- 2012-03-09 CN CN2012100612579A patent/CN102650706A/zh active Pending
- 2012-11-07 WO PCT/CN2012/084183 patent/WO2013131378A1/zh active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101165561A (zh) * | 2006-10-18 | 2008-04-23 | 群康科技(深圳)有限公司 | 背光模组及液晶显示装置 |
| JP2008158034A (ja) * | 2006-12-21 | 2008-07-10 | Toppan Printing Co Ltd | 光学シートとそれを用いたバックライト・ユニットおよびディスプレイ |
| CN101230970B (zh) * | 2007-01-22 | 2010-12-08 | 阿尔卑斯电气株式会社 | 照明单元 |
| JP2009105025A (ja) * | 2007-10-04 | 2009-05-14 | Hitachi Chem Co Ltd | 導光体及び導光体を用いた面光源装置 |
| JP2010218972A (ja) * | 2009-03-18 | 2010-09-30 | Minebea Co Ltd | 面状照明装置 |
| CN101630032A (zh) * | 2009-08-06 | 2010-01-20 | 长兴化学工业股份有限公司 | 反射式偏光片 |
| CN102650706A (zh) * | 2012-03-09 | 2012-08-29 | 京东方科技集团股份有限公司 | 反射片及其制备方法、具有该反射片的背光源 |
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