技术领域technical field
本发明涉及显示器技术领域，尤其涉及一种可用于透明显示或可在透明显示与普通显示两种模式间切换的背光源及应用该背光源的显示器。The invention relates to the technical field of displays, in particular to a backlight source that can be used for transparent display or can be switched between two modes of transparent display and normal display, and a display using the backlight source.
背景技术Background technique
在薄膜场效应管液晶显示器(Thin Film Transistor-Liquid CrystalDisplay，TFT-LCD)显示中，背光源非常重要，背光源是位于液晶显示器(LCD)背后的一种光源，因为LCD本身不发光，它显示图形或字符是它对光线调制的结果，背光源的发光效果将直接影响到液晶显示模块视觉效果。三星等推出了一种透明显示的LCD显示器，可以用于橱窗展示等，其利用了外部的环境光作为LCD的背光。因为普通的LCD背光源不透明，难以应用到透明显示中，所以透明显示的背光源(BackLight)一直是一个难以解决的问题。In the display of Thin Film Transistor-Liquid Crystal Display (TFT-LCD), the backlight is very important. The backlight is a light source located behind the liquid crystal display (LCD), because the LCD itself does not emit light, it displays Graphics or characters are the result of its modulation of light, and the luminous effect of the backlight will directly affect the visual effect of the LCD module. Samsung and the like have introduced a transparent LCD display, which can be used for window display, etc., which utilizes external ambient light as the backlight of the LCD. Because the common LCD backlight is opaque, it is difficult to apply it to transparent display, so the backlight of transparent display (BackLight) has always been a difficult problem to solve.
背光源一般包括：光源、导光板(LGP)、底反射片、光学膜材、结构件(背板、框架、灯条板等等)。其中，导光板设置在LCD接收入射光的一侧，光学膜材设置在导光板和LCD之间，光源设置在导光板的侧边，底反射片围设在导光板的外侧，用于反射光线。背光源中最核心技术为导光板的光学技术，导光板用于基于光散乱原理将入射的平行光转换成平面光，从导光板出射的光线再经过光学膜材的扩散、偏振，以及经过光学膜材中聚光棱镜片使光线聚集并调整光线发散角度，形成所需要的面光源提供给LCD。普通背光源中的导光板本身是透明的，通过在导光板上印刷不同的网点，光在打到网点上的时候发生散射，从而形成均匀的面光源。但因为网点是通过丝网印刷方式做的，其大小较大，也导致导光板的透明性不好。另外为了提高导光板的均匀性和光效，使用的反射膜和扩散膜、以及增亮膜等不透明光学膜材，使得普通导光板无法应用到透明显示中。Backlight generally includes: light source, light guide plate (LGP), bottom reflector, optical film material, structural parts (backplane, frame, light bar, etc.). Among them, the light guide plate is set on the side where the LCD receives incident light, the optical film is set between the light guide plate and the LCD, the light source is set on the side of the light guide plate, and the bottom reflector is set around the outside of the light guide plate for reflecting light . The core technology of the backlight is the optical technology of the light guide plate. The light guide plate is used to convert the incident parallel light into plane light based on the principle of light scattering. The condensing prism sheet in the film material gathers the light and adjusts the divergence angle of the light to form the required surface light source for the LCD. The light guide plate in the ordinary backlight source is transparent. By printing different dots on the light guide plate, the light is scattered when it hits the dots, thus forming a uniform surface light source. However, because the dots are made by screen printing, their size is relatively large, which also leads to poor transparency of the light guide plate. In addition, in order to improve the uniformity and light efficiency of the light guide plate, opaque optical film materials such as reflective film, diffusion film, and brightness enhancement film are used, so that ordinary light guide plates cannot be applied to transparent displays.
发明内容Contents of the invention
(一)要解决的技术问题(1) Technical problems to be solved
本发明要解决的技术问题是：提供一种可用于透明显示的或可在透明显示与普通显示两种模式间切换的背光源及显示器。The technical problem to be solved by the present invention is to provide a backlight source and a display that can be used for transparent display or can switch between two modes of transparent display and normal display.
(二)技术方案(2) Technical solution
为解决上述问题，本发明提供了一种背光源，包括：透明的导光板、设置在所述导光板一侧的光源、围设在光源外的灯反射板，该背光源还包括透明的基底以及设置在基底与所述导光板之间的液晶层，所述液晶层的液晶为聚合物分散液晶PDLC或聚合物网络液晶PNLC，所述基底上设置有第一透明电极层，所述导光板下设置有与所述第一透明电极层对应的第二透明电极层。In order to solve the above problems, the present invention provides a backlight, comprising: a transparent light guide plate, a light source arranged on one side of the light guide plate, and a lamp reflection plate surrounding the light source; the backlight also includes a transparent base And a liquid crystal layer arranged between the base and the light guide plate, the liquid crystal of the liquid crystal layer is a polymer dispersed liquid crystal PDLC or a polymer network liquid crystal PNLC, the first transparent electrode layer is arranged on the base, and the light guide plate A second transparent electrode layer corresponding to the first transparent electrode layer is provided below.
其中，所述第一透明电极层与所述第二透明电极层中至少有一个为图案化的。Wherein, at least one of the first transparent electrode layer and the second transparent electrode layer is patterned.
其中，所述导光板下粘附有玻璃层，所述第二透明电极层设置在所述玻璃层上。Wherein, a glass layer is adhered under the light guide plate, and the second transparent electrode layer is arranged on the glass layer.
其中，所述液晶层包括封框胶、液晶以及隔垫物。Wherein, the liquid crystal layer includes a sealant, a liquid crystal, and a spacer.
其中，所述光源为冷阴极萤光灯管CCFL或发光二极管LED。Wherein, the light source is a cold cathode fluorescent lamp CCFL or a light emitting diode LED.
其中，所述导光板由聚碳酸酯PC、聚甲基丙烯酸甲酯PMMA或玻璃材料制成，或者通过光学透明胶OCA将由上述任意两种材料制成的基板贴合而成。Wherein, the light guide plate is made of polycarbonate PC, polymethyl methacrylate PMMA or glass material, or a substrate made of any two of the above materials is laminated by optically transparent adhesive OCA.
本发明提供的显示器，包括上述的背光源。The display provided by the present invention includes the above-mentioned backlight source.
(三)有益效果(3) Beneficial effects
本发明的背光源和显示器通过液晶作为网点控制，将液晶填充在两块图案化透明电极中，通过加电和去电，可以实现图案化电极上的液晶呈现光散射态和透明态，从而可在背光和透明之间找到变化平衡点；应用不同的图案化电极，还可以实现不同的网点分布，在透明显示中的普通背光和透明显示中进行调节。The backlight source and display of the present invention are controlled by liquid crystals as dots, and the liquid crystals are filled in two patterned transparent electrodes, and the liquid crystals on the patterned electrodes can be in a light-scattering state and a transparent state through power-on and power-off. Find a balance point between backlight and transparency; apply different patterned electrodes, and also achieve different dot distributions, which can be adjusted in normal backlight and transparent displays in transparent displays.
附图说明Description of drawings
图1为依照本发明一种实施方式的背光源的结构示意图。FIG. 1 is a schematic structural diagram of a backlight according to an embodiment of the present invention.
具体实施方式Detailed ways
本发明提出的背光源，结合附图及实施例详细说明如下。The backlight source provided by the present invention is described in detail as follows with reference to the accompanying drawings and embodiments.
本发明的核心思想为：通过将液晶作为导光板的网点控制，通过加电和去电，实现图案化电极上的液晶呈现光散射态和透明态，从而可在背光和透明之间找到变化平衡点，作为显示器的背光源，可实现背光源的透明，用于透明显示，尤其是透明TFT-LCD显示。The core idea of the present invention is: by using the liquid crystal as the dot control of the light guide plate, through power-on and power-off, the liquid crystal on the patterned electrode is in a light-scattering state and a transparent state, so that a change balance can be found between backlight and transparency Dots, as the backlight source of the display, can realize the transparency of the backlight source, and are used for transparent display, especially transparent TFT-LCD display.
如图1所示，依照本发明一种实施方式显示器的背光源包括：导光板1、设置在导光板1一侧的光源3、围设在光源2外的灯反射板3，还包括基底4以及设置在基底4与导光板1之间的液晶层5，优选的液晶5为聚合物分散液晶(Polymer Dispersed Liquid Crystal，PDLC)或聚合物网络液晶(PolymerNetwork Liquid Crystal，PNLC)，基底4上设置有第一透明电极层6，导光板1下设置有与第一透明电极层6对应的第二透明电极层7。第一透明电极层6与第二透明电极层7中至少有一个为图案化的。优选地，导光板1下的第二透明电极层7为图案化的。As shown in FIG. 1 , the backlight source of a display according to one embodiment of the present invention includes: a light guide plate 1 , a light source 3 arranged on one side of the light guide plate 1 , a lamp reflector 3 surrounding the light source 2 , and a base 4 And the liquid crystal layer 5 that is arranged between the substrate 4 and the light guide plate 1, the preferred liquid crystal 5 is a polymer dispersed liquid crystal (Polymer Dispersed Liquid Crystal, PDLC) or a polymer network liquid crystal (PolymerNetwork Liquid Crystal, PNLC), and the substrate 4 is provided There is a first transparent electrode layer 6 , and a second transparent electrode layer 7 corresponding to the first transparent electrode layer 6 is arranged under the light guide plate 1 . At least one of the first transparent electrode layer 6 and the second transparent electrode layer 7 is patterned. Preferably, the second transparent electrode layer 7 under the light guide plate 1 is patterned.
液晶层本身是非透明的，即会对外界环境光发生散射，而在加电场时，液晶会变透明，而且透明度极高，且其散射程度与电场强度相关。通过对图案化的透明电极加电，可以实现电极区域透明，而非电极区域光散射，即由非电极区的液晶实现原导光板光散射网点的功能。The liquid crystal layer itself is non-transparent, that is, it will scatter external ambient light, and when an electric field is applied, the liquid crystal will become transparent, and the transparency is extremely high, and the degree of scattering is related to the strength of the electric field. By applying electricity to the patterned transparent electrodes, the transparency of the electrode area can be realized, and the light scattering in the non-electrode area, that is, the function of the original light-scattering dots of the light guide plate is realized by the liquid crystal in the non-electrode area.
为了实现更好的透过率，在第二透明电极层和第一透明电极层的图案化电极可以不同对，使某一层更全的覆盖，即透明电极层尽量覆盖整个面，以实现更高的透明度，如图1中所示，在白色电极加电时，该电极对应的液晶呈现透明态，而黑色电极不加电，则其对应的液晶呈现散射态，作为散射网点。当白色和黑色的电极都加电时，则液晶整体都为透明态。必要时也可以白色、黑色的电极都不加电或控制合适的电压，使整个液晶层都呈现散射态。应用不同的图案化电极，还可以实现不同的网点分布，在透明显示中的背光和透明中进行调节。在图案化电极控制下，实现不同的散射。In order to achieve better transmittance, the patterned electrodes on the second transparent electrode layer and the first transparent electrode layer can be in different pairs, so that a certain layer can be covered more completely, that is, the transparent electrode layer can cover the entire surface as much as possible, so as to achieve better transparency. High transparency, as shown in Figure 1, when the white electrode is powered, the liquid crystal corresponding to the electrode is in a transparent state, while the black electrode is not powered, the corresponding liquid crystal is in a scattering state, as a scattering network. When both the white and black electrodes are powered on, the liquid crystal as a whole is in a transparent state. If necessary, neither the white nor the black electrodes are energized or an appropriate voltage is controlled so that the entire liquid crystal layer is in a scattering state. Different patterned electrodes can also be used to achieve different dot distributions, which can be adjusted in backlight and transparency in transparent displays. Under the control of patterned electrodes, different scattering is achieved.
液晶层还包括必要的封框胶(sealant)以及隔垫物(spacer)等公知的结构，再次不再赘述。The liquid crystal layer also includes known structures such as necessary sealants and spacers, which will not be described again.
另外，光源2也可为冷阴极萤光灯管CCFL或发光二极管LED。导光板1可由聚碳酸酯PC、聚甲基丙烯酸甲酯PMMA或玻璃材料制成，或者通过光学透明胶(Optical Clear Adhesive，OCA)将由上述任意两种材料制成的基板贴合而成。In addition, the light source 2 can also be a cold cathode fluorescent lamp CCFL or a light emitting diode LED. The light guide plate 1 can be made of polycarbonate PC, polymethyl methacrylate PMMA or glass material, or a substrate made of any two of the above materials can be laminated by optical clear adhesive (Optical Clear Adhesive, OCA).
因为普通导光板为PC或PMMA，在上面做透明电极并图案化容易发生一定的形变，可将透明电极先沉积在一玻璃层上，再使用OCA粘接等方式将该玻璃层与导光板粘接在一起。Because the ordinary light guide plate is PC or PMMA, making transparent electrodes on it and patterning is easy to cause certain deformation. The transparent electrodes can be deposited on a glass layer first, and then the glass layer and the light guide plate are bonded by OCA bonding. connected together.
以上实施方式仅用于说明本发明，而并非对本发明的限制，有关技术领域的普通技术人员，在不脱离本发明的精神和范围的情况下，还可以做出各种变化和变型，因此所有等同的技术方案也属于本发明的范畴，本发明的专利保护范围应由权利要求限定。The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Those of ordinary skill in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all Equivalent technical solutions also belong to the category of the present invention, and the scope of patent protection of the present invention should be defined by the claims.
| Application Number | Priority Date | Filing Date | Title |
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| CN201110194234.0ACN102679238B (en) | 2011-07-12 | 2011-07-12 | Backlight and display device |
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