CN103293747A - Transparent liquid crystal display device - Google Patents

Abstract

Translated fromChinese

一种透明液晶显示装置，所述透明液晶显示装置具有多个像素单元，所述透明液晶显示装置包括：第一液晶层，以及位于所述第一液晶层上方的第一偏振片；位于所述第一液晶层下方的透明导光板，所述透明导光板一侧背光源，所述背光源和透明导光板之间设置有第二偏振片；设置于所述透明导光板下方的第二液晶层，所述第二液晶层的下方设置有第三偏振片。本发明的透明液晶显示装置，可以简单有效的控制透明的液晶显示装置，使其具有较高的对比度和较好的透明显示效果。

A transparent liquid crystal display device, the transparent liquid crystal display device has a plurality of pixel units, and the transparent liquid crystal display device includes: a first liquid crystal layer, and a first polarizing plate located above the first liquid crystal layer; A transparent light guide plate under the first liquid crystal layer, a backlight on one side of the transparent light guide plate, a second polarizer is arranged between the backlight source and the transparent light guide plate; a second liquid crystal layer arranged under the transparent light guide plate , a third polarizer is arranged under the second liquid crystal layer. The transparent liquid crystal display device of the present invention can simply and effectively control the transparent liquid crystal display device so that it has higher contrast ratio and better transparent display effect.

Description

Translated fromChinese

透明液晶显示装置Transparent liquid crystal display device

技术领域technical field

本发明涉及液晶显示领域，特别涉及一种透明液晶显示装置。The invention relates to the field of liquid crystal display, in particular to a transparent liquid crystal display device.

背景技术Background technique

液晶显示器以体积小，重量轻，低辐射等优点广泛应用于各种领域。Liquid crystal displays are widely used in various fields due to their small size, light weight, and low radiation.

液晶显示面板是液晶显示器中最主要的组成部分。液晶显示器的工作原理为：通过改变施加在液晶层上的电压改变液晶分子的偏转角度，从而控制偏振光旋转方向和偏振状态，以实现液晶显示器显示状态的改变。The liquid crystal display panel is the most important component of the liquid crystal display. The working principle of the liquid crystal display is: by changing the voltage applied to the liquid crystal layer to change the deflection angle of the liquid crystal molecules, thereby controlling the rotation direction and polarization state of polarized light, so as to realize the change of the display state of the liquid crystal display.

请参考图1，现有的液晶显示面板的结构主要包括：阵列基板10；与所述阵列基板10相对设置的彩膜基板12；位于所述阵列基板10和彩膜基板12之间的液晶层11；位于所述彩膜基板12上方的上偏光片13；以及位于所述阵列基板10下方的下偏光片16，所述上偏光片13和下偏光片16的偏振方向垂直。Please refer to FIG. 1 , the structure of the existing liquid crystal display panel mainly includes: anarray substrate 10 ; acolor filter substrate 12 opposite to thearray substrate 10 ; a liquid crystal layer located between thearray substrate 10 and thecolor filter substrate 12 11; anupper polarizer 13 located above thecolor filter substrate 12; and alower polarizer 16 located below thearray substrate 10, the polarization directions of theupper polarizer 13 and thelower polarizer 16 are perpendicular.

其中，所述阵列基板10上具有像素电极，所述彩膜基板12上具有公共电极，通过在所述像素电极和公共电极上施加电压后，由于所述像素电极和公共电极之间具有电势差，液晶层11内的液晶分子在上述电势差的作用下发生偏转，从而控制偏振光的偏振方向与偏振状态，使经过下偏光片16的光线在液晶层11内发生偏转，最后由上偏光片13射出。Wherein, thearray substrate 10 has a pixel electrode, and thecolor filter substrate 12 has a common electrode, after applying a voltage to the pixel electrode and the common electrode, since there is a potential difference between the pixel electrode and the common electrode, The liquid crystal molecules in theliquid crystal layer 11 are deflected under the action of the above potential difference, thereby controlling the polarization direction and polarization state of the polarized light, so that the light passing through thelower polarizer 16 is deflected in theliquid crystal layer 11, and finally emitted from theupper polarizer 13 .

随着技术的不断发展，为了满足人们对于液晶显示装置的不同需求，推出了透明的液晶显示装置，请参考图2，现有技术的透明液晶显示装置，包括：背光源200；位于所述背光源200一侧的透明的导光板203；位于所述导光板203和背光源200之间的第一偏振片201；位于所述导光板203上方的阵列基板205；位于所述阵列基板205上方的彩膜基板209；位于所述阵列基板205和彩膜基板209之间区域的液晶层207，所述液晶层207内具有多个液晶分子206；位于所述彩膜基板209上方的第二偏振片211。With the continuous development of technology, in order to meet people's different needs for liquid crystal display devices, transparent liquid crystal display devices have been introduced. Please refer to FIG. 2. The transparent liquid crystal display device in the prior art includes: abacklight 200; A transparentlight guide plate 203 on one side of thesource 200; afirst polarizer 201 located between thelight guide plate 203 and thebacklight source 200; anarray substrate 205 located above thelight guide plate 203; anarray substrate 205 located above thearray substrate 205 Thecolor filter substrate 209; theliquid crystal layer 207 located in the area between thearray substrate 205 and thecolor filter substrate 209, theliquid crystal layer 207 has a plurality ofliquid crystal molecules 206; the second polarizer located above thecolor filter substrate 209 211.

人们可以透过图2所示的透明液晶显示装置看到放置于其背后的物品，并且透明液晶显示装置的面板上还能显示信息，这种透明液晶显示装置可以运用于橱窗显示，客户可透过透明液晶显示装置看到位于其后的商品，同时在透明液晶显示装置的面板上可以显示商品的相关信息，十分方便。People can see the items placed behind it through the transparent liquid crystal display device shown in Figure 2, and information can also be displayed on the panel of the transparent liquid crystal display device. Through the transparent liquid crystal display device, the commodity located behind can be seen, and at the same time, relevant information of the commodity can be displayed on the panel of the transparent liquid crystal display device, which is very convenient.

但是图2所示的现有技术的透明液晶显示装置，背光源200通过导光板203后光线均匀的进入透明液晶显示装置，可提高图像的亮度，但是，由于该透明显示装置不能关断背面环境光穿过面板，所以当图像要显示黑态时，且背面环境光的亮度较高的话，该图像中的黑态由于有背面环境光的存在，黑态不够黑，从而严重降低显示的对比度。即现有技术中无法解决很好的透明显示的同时液晶面板上的信息图像也具备较高的对比度的技术问题。But in the prior art transparent liquid crystal display device shown in Fig. 2, thebacklight source 200 passes through thelight guide plate 203, and the light enters the transparent liquid crystal display device evenly, which can improve the brightness of the image. However, because the transparent display device cannot shut off the back environment Light passes through the panel, so when the image is to display a black state, and the brightness of the back ambient light is high, the black state in the image is not black enough due to the existence of the back ambient light, which seriously reduces the contrast of the display. That is, the prior art cannot solve the technical problem that the information image on the liquid crystal panel also has a high contrast ratio while having a good transparent display.

为了进一步满足用户的需求，如何简单有效控制透明的液晶显示装置，使其在具有较高透明度的同时，显示的图形具有较高对比度，成为亟需解决的问题。In order to further meet the needs of users, how to simply and effectively control the transparent liquid crystal display device so that the displayed graphics have high contrast while having high transparency has become an urgent problem to be solved.

发明内容Contents of the invention

本发明解决的问题是提供一种透明液晶显示装置，可以简单有效的控制透明的液晶显示装置，使其在具有较高透明度的同时，显示的图形具有较高对比度。The problem to be solved by the present invention is to provide a transparent liquid crystal display device, which can simply and effectively control the transparent liquid crystal display device so that the displayed graphics have high contrast while having high transparency.

为解决上述问题，本发明的实施例提供了一种透明液晶显示装置，所述透明液晶显示装置具有多个像素单元，所述透明液晶显示装置包括：In order to solve the above problems, an embodiment of the present invention provides a transparent liquid crystal display device, the transparent liquid crystal display device has a plurality of pixel units, and the transparent liquid crystal display device includes:

第一液晶层，以及位于所述第一液晶层上方的第一偏振片；a first liquid crystal layer, and a first polarizer positioned above the first liquid crystal layer;

位于所述第一液晶层下方的透明导光板；a transparent light guide plate located below the first liquid crystal layer;

位于所述透明导光板一侧的背光源，所述透明导光板和背光源之间设置有第二偏振片；a backlight located on one side of the transparent light guide plate, a second polarizer is arranged between the transparent light guide plate and the backlight;

设置于所述透明导光板下方的第二液晶层，所述第二液晶层的下方设置有第三偏振片。The second liquid crystal layer is arranged under the transparent light guide plate, and a third polarizer is arranged under the second liquid crystal layer.

可选地，所述透明液晶显示装置的多个像素单元分别呈灰阶显示或透明态显示，使所述透明液晶显示装置部分区域显示图形并部分区域透明。Optionally, the plurality of pixel units of the transparent liquid crystal display device respectively display in grayscale or transparent state, so that part of the transparent liquid crystal display device displays graphics and part of the region is transparent.

可选地，所述像素单元呈透明态显示时，背光源的光线经第一液晶层后，不能穿过第一偏振片，而环境光线经第二液晶层、第一液晶层后，穿过第一偏振片。Optionally, when the pixel unit is displayed in a transparent state, the light from the backlight cannot pass through the first polarizer after passing through the first liquid crystal layer, while the ambient light passes through the second liquid crystal layer and the first liquid crystal layer, and passes through first polarizer.

可选地，所述灰阶显示包括白态显示和黑态显示。Optionally, the gray scale display includes white state display and black state display.

可选地，所述像素单元呈白态显示时，当背光源的光线经第一液晶层后，穿过第一偏振片。Optionally, when the pixel unit displays in a white state, the light from the backlight passes through the first polarizer after passing through the first liquid crystal layer.

可选地，所述像素单元呈黑态显示时，背光源的光线经第一液晶层后，不能穿过第一偏振片，并且环境光线经第二液晶层、第一液晶层后，也不能穿过第一偏振片。Optionally, when the pixel unit is displayed in a black state, the light from the backlight cannot pass through the first polarizer after passing through the first liquid crystal layer, and the ambient light cannot pass through the second liquid crystal layer and the first liquid crystal layer. through the first polarizer.

可选地，第一上基板和第一下基板，所述第一液晶层夹于第一上基板和第一下基板之间，形成第一液晶面板。Optionally, the first upper substrate and the first lower substrate, the first liquid crystal layer is sandwiched between the first upper substrate and the first lower substrate, forming a first liquid crystal panel.

可选地，所述第一上基板为彩膜基板。Optionally, the first upper substrate is a color filter substrate.

可选地，所述第一液晶面板为主动驱动型液晶面板。Optionally, the first liquid crystal panel is an actively driven liquid crystal panel.

可选地，所述第一液晶面板可以为TN型、FFS型或IPS型等显示模式。Optionally, the first liquid crystal panel may be in a display mode such as TN type, FFS type or IPS type.

可选地，所述第一下基板为阵列基板，所述第一下基板在靠近第一液晶层的一侧设置有多条相互平行的第一扫描线，和多条与所述第一扫描线垂直的第一数据线，所述多条第一扫描线和第一数据线交叉限定多个第一子像素单元。Optionally, the first lower substrate is an array substrate, and the first lower substrate is provided with a plurality of first scanning lines parallel to each other on a side close to the first liquid crystal layer, and a plurality of first scanning lines parallel to the first scanning line. The first data line is perpendicular to the line, and the plurality of first scan lines intersect with the first data line to define a plurality of first sub-pixel units.

可选地，第二上基板和第二下基板，所述第二液晶层夹于第二上基板和第二下基板之间形成第二液晶面板。Optionally, the second upper substrate and the second lower substrate, the second liquid crystal layer is sandwiched between the second upper substrate and the second lower substrate to form a second liquid crystal panel.

可选地，所述第二液晶面板为主动驱动型液晶面板。Optionally, the second liquid crystal panel is an actively driven liquid crystal panel.

可选地，所述第二液晶面板可以为TN型、FFS型或IPS型等显示模式。Optionally, the second liquid crystal panel may be in a display mode such as TN type, FFS type or IPS type.

可选地，所述第二下基板靠近第二液晶层的一侧设置有多条相互平行的第二扫描线，和多条与所述第二扫描线垂直的第二数据线，所述多条第二扫描线和第二数据线交叉限定多个第二子像素单元。Optionally, a plurality of second scan lines parallel to each other and a plurality of second data lines perpendicular to the second scan lines are arranged on the side of the second lower substrate close to the second liquid crystal layer, and the plurality of second data lines are arranged perpendicular to the second scan lines. The intersection of the second scanning line and the second data line defines a plurality of second sub-pixel units.

可选地，所述第一子像素单元和所述第二子像素单元一一对应设置。Optionally, the first sub-pixel unit and the second sub-pixel unit are provided in a one-to-one correspondence.

可选地，所述第二液晶面板为被动驱动型液晶面板。Optionally, the second liquid crystal panel is a passively driven liquid crystal panel.

可选地，所述第二上基板靠近第二液晶层的一侧设置有多条相互平行的第一电极，所述第二下基板靠近第二液晶层的一侧设置有多条相互平行的第二电极，所述第一电极垂直于所述第二电极，所述第一电极和第二电极相交的区域形成多个第二子像素单元。Optionally, the side of the second upper substrate close to the second liquid crystal layer is provided with multiple parallel first electrodes, and the side of the second lower substrate close to the second liquid crystal layer is provided with multiple parallel first electrodes. The second electrode, the first electrode is perpendicular to the second electrode, and the intersection of the first electrode and the second electrode forms a plurality of second sub-pixel units.

可选地，所述第一子像素单元和所述第二子像素单元一一对应设置。Optionally, the first sub-pixel unit and the second sub-pixel unit are provided in a one-to-one correspondence.

与现有技术相比，本发明的实施例具有以下优点：Compared with the prior art, the embodiments of the present invention have the following advantages:

本发明的实施例中，透明液晶显示装置包括第一液晶层、位于所述第一液晶层下方的第二液晶层、位于所述第一液晶层上方的第一偏振片、位于背光源和第一液晶层之间的第二偏振片、以及位于所述第二液晶层下方的第三偏振片，根据液晶层的类型、偏振片的类型，合理控制环境光是否通过第二液晶层和/或第一液晶层，控制背光源的光线是否通过第一液晶层，达到简单有效的控制透明的液晶显示装置，使其在具有较高的透明度的同时，显示的图形具有较高对比度。In an embodiment of the present invention, the transparent liquid crystal display device includes a first liquid crystal layer, a second liquid crystal layer located below the first liquid crystal layer, a first polarizer located above the first liquid crystal layer, a backlight source and a second liquid crystal layer. A second polarizer between the liquid crystal layers, and a third polarizer located below the second liquid crystal layer, according to the type of the liquid crystal layer and the type of the polarizer, reasonably control whether ambient light passes through the second liquid crystal layer and/or The first liquid crystal layer controls whether the light from the backlight passes through the first liquid crystal layer, so as to simply and effectively control the transparent liquid crystal display device, so that the displayed graphics have high contrast while having high transparency.

附图说明Description of drawings

图1是现有技术的液晶显示面板的剖面结构示意图；FIG. 1 is a schematic cross-sectional structure diagram of a liquid crystal display panel in the prior art;

图2是现有技术的透明液晶显示装置的剖面结构示意图；2 is a schematic cross-sectional structure diagram of a transparent liquid crystal display device in the prior art;

图3是本发明第一实施例中透明液晶显示装置的剖面结构示意图；3 is a schematic cross-sectional structure diagram of a transparent liquid crystal display device in the first embodiment of the present invention;

图4是本发明第一实施例中透明液晶显示装置的像素单元呈灰阶显示中的黑态显示时，透明液晶显示装置的像素单元的工作示意图；4 is a schematic diagram of the operation of the pixel unit of the transparent liquid crystal display device when the pixel unit of the transparent liquid crystal display device in the first embodiment of the present invention is displayed in a black state in grayscale display;

图5是本发明第一实施例中透明液晶显示装置的像素单元呈灰阶显示中的白态显示时，透明液晶显示装置的像素单元的第一种工作示意图；Fig. 5 is a schematic diagram of the first operation of the pixel unit of the transparent liquid crystal display device when the pixel unit of the transparent liquid crystal display device in the first embodiment of the present invention is displayed in the white state in the gray scale display;

图6是本发明第一实施例中透明液晶显示装置的像素单元呈灰阶显示中的白态显示时，透明液晶显示装置的像素单元的第二种工作示意图；6 is a schematic diagram of the second operation of the pixel unit of the transparent liquid crystal display device when the pixel unit of the transparent liquid crystal display device in the first embodiment of the present invention is displayed in the white state in the grayscale display;

图7是本发明第一实施例中透明液晶显示装置的像素单元呈透明态显示时，透明液晶显示装置的像素单元的工作示意图；7 is a schematic diagram of the operation of the pixel unit of the transparent liquid crystal display device when the pixel unit of the transparent liquid crystal display device is displayed in a transparent state in the first embodiment of the present invention;

图8是本发明第二实施例中透明液晶显示装置的剖面结构示意图；8 is a schematic cross-sectional structure diagram of a transparent liquid crystal display device in a second embodiment of the present invention;

图9是本发明第二实施例中第一下基板的第一数据线和第一扫描线的示意图；9 is a schematic diagram of first data lines and first scan lines of the first lower substrate in the second embodiment of the present invention;

图10是本发明第二实施例中被动驱动型的第二液晶面板的第一电极和第二电极的示意图；10 is a schematic diagram of the first electrode and the second electrode of the passively driven second liquid crystal panel in the second embodiment of the present invention;

图11是本发明实施例形成的透明液晶显示装置的工作示意图。FIG. 11 is a working diagram of a transparent liquid crystal display device formed in an embodiment of the present invention.

具体实施方式Detailed ways

正如背景技术所述，现有技术的透明液晶显示装置无法解决透明显示较高的同时液晶显示面板上的信息图像也具备较高的对比度的技术问题。As described in the background, the prior art transparent liquid crystal display device cannot solve the technical problem of high transparency and high contrast of information images on the liquid crystal display panel.

经过研究后，发明人发现，通过包含两个液晶层的透明液晶显示装置，可以通过偏振片的类型辅助以适当的控制方法，简单有效的实现透明液晶显示装置在具有较高的透明度的同时，显示的图形具有较高对比度。为了使本发明的上述目的、特征和优点能够更加明显易懂，下面结合附图对本发明的具体实施方式做详细的说明。After research, the inventors found that through a transparent liquid crystal display device comprising two liquid crystal layers, the type of polarizer can be assisted by an appropriate control method, and the transparent liquid crystal display device can be realized simply and effectively while having high transparency. Graphics are displayed with high contrast. In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings.

第一实施例first embodiment

请参考图3（为了绘图简便，在本发明的实施例中仅示出了一个像素单元的结构），本发明实施例的透明液晶显示装置具有多个像素单元，所述透明液晶显示装置包括：Please refer to FIG. 3 (for simplicity of drawing, only the structure of one pixel unit is shown in the embodiment of the present invention), the transparent liquid crystal display device of the embodiment of the present invention has multiple pixel units, and the transparent liquid crystal display device includes:

第一液晶层303，以及位于所述第一液晶层303上方的第一偏振片301；A firstliquid crystal layer 303, and afirst polarizer 301 located above the firstliquid crystal layer 303;

位于所述第一液晶层303下方的透明导光板305；a transparentlight guide plate 305 located below the firstliquid crystal layer 303;

位于所述透明导光板305一侧的背光源300，所述背光源300和透明导光板305之间设置有第二偏振片311；Abacklight 300 located on one side of the transparentlight guide plate 305, asecond polarizer 311 is arranged between thebacklight 300 and the transparentlight guide plate 305;

设置于所述透明导光板305下方的第二液晶层307，所述第二液晶层307的下方设置有第三偏振片309。The secondliquid crystal layer 307 is disposed below the transparentlight guide plate 305 , and athird polarizer 309 is disposed below the secondliquid crystal layer 307 .

其中，所述第一液晶层303和第二液晶层307均为TN（Twisted Nematic，扭曲排列）型液晶分子，并且第一液晶层303和第二液晶层307均为常白显示模式，即不施加电压的情况下，第一液晶层303和第二液晶层307的液晶分子从上至下均为90度扭转，偏正光经过第一液晶层303或第二液晶层307后也被偏转90度；在加电时第一液晶层303和第二液晶层307的液晶分子在电场的作用下方向转到与第一偏振片301和第三偏振片309垂直的方向，偏振光经过第一液晶层303或第二液晶层307后不会发生扭转。Wherein, the firstliquid crystal layer 303 and the secondliquid crystal layer 307 are both TN (Twisted Nematic, twisted alignment) type liquid crystal molecules, and both the firstliquid crystal layer 303 and the secondliquid crystal layer 307 are in normally white display mode, that is, not When a voltage is applied, the liquid crystal molecules in the firstliquid crystal layer 303 and the secondliquid crystal layer 307 are twisted 90 degrees from top to bottom, and the polarized light is also deflected by 90 degrees after passing through the firstliquid crystal layer 303 or the secondliquid crystal layer 307 The liquid crystal molecules of the firstliquid crystal layer 303 and the secondliquid crystal layer 307 turn to the direction perpendicular to thefirst polarizer 301 and thethird polarizer 309 under the effect of the electric field when power is applied, and the polarized light passes through the firstliquid crystal layer 303 or the secondliquid crystal layer 307 does not twist.

所述第一偏振片301位于所述第一液晶层303上方，经过第一液晶层303的光线中偏振方向和第一偏振片301的偏振方向一致的光线可通过所述第一偏振片301，进而就可以进入用户的视线被用户所感知；所述第二偏振片311允许背光源300的光线中偏振方向与第二偏振片311的偏振方向一致的光线进入第一液晶层303；所述第三偏振片309用于允许环境光中与所述第三偏振片309的偏振方向一致的偏振光通过并进入第二液晶层307。Thefirst polarizer 301 is located above the firstliquid crystal layer 303, and among the light passing through the firstliquid crystal layer 303, the light whose polarization direction is consistent with that of thefirst polarizer 301 can pass through thefirst polarizer 301, Then, it can enter the user's line of sight and be perceived by the user; thesecond polarizer 311 allows light from thebacklight 300 whose polarization direction is consistent with that of thesecond polarizer 311 to enter the firstliquid crystal layer 303; The threepolarizers 309 are used to allow the polarized light in the ambient light that is in the same polarization direction as thethird polarizer 309 to pass through and enter the secondliquid crystal layer 307 .

本发明提供的透明液晶显示装置，根据第一偏振片301、第二偏振片311和第三偏振片309的类型的不同，可以通过不同的控制方法实现像素单元呈灰阶显示或透明显示，包括以下实例：In the transparent liquid crystal display device provided by the present invention, according to the different types of thefirst polarizer 301, thesecond polarizer 311 and thethird polarizer 309, grayscale display or transparent display of the pixel unit can be realized through different control methods, including Examples below:

实例1Example 1

在本发明的实例1中，所述第一偏振片301设置为允许P方向的偏振光通过；与所述第一偏振片301不同，所述第二偏振片311和第三偏振片309设置为允许S方向的偏振光通过，所述S方向垂直于P方向。In Example 1 of the present invention, thefirst polarizer 301 is set to allow the polarized light in the P direction to pass; different from thefirst polarizer 301, thesecond polarizer 311 and thethird polarizer 309 are set to Polarized light in the S direction, which is perpendicular to the P direction, is allowed to pass.

发明人发现，在本发明的实例1中，背光源300的光线经过第二偏振片311后，仅剩下S方向的偏振光，当不对所述第一液晶层303施加电压时，背光源300中S方向的偏振光经过第一液晶层303后偏转90度，变成P方向的偏振光，可以透过第一偏振片301；当对所述第一液晶层303施加电压时，所述背光源300中S方向的偏振光经过第一液晶层303后不发生偏转，仍然为S方向的偏振光，不能透过第一偏振片301。The inventor found that, in Example 1 of the present invention, after the light from thebacklight 300 passes through thesecond polarizer 311, only the polarized light in the S direction remains. When no voltage is applied to the firstliquid crystal layer 303, thebacklight 300 The polarized light in the S direction is deflected by 90 degrees after passing through the firstliquid crystal layer 303, and becomes the polarized light in the P direction, which can pass through thefirst polarizer 301; when a voltage is applied to the firstliquid crystal layer 303, the backlight The polarized light in the S direction in thesource 300 is not deflected after passing through the firstliquid crystal layer 303 , and is still the polarized light in the S direction, which cannot pass through thefirst polarizer 301 .

对于环境光，所述环境光经过第三偏振片309后，仅剩下S方向的偏振光，当不对所述第二液晶层307施加电压时，环境光中S方向的偏振光经过第二液晶层307时发生偏转，通过第二液晶层307后变为P方向的偏振光，若不对第一液晶层303施加电压，环境光中P方向的偏振光在经过第一液晶层303后，变成S方向的偏振光，不能通过第一偏振片301，若对第一液晶层303施加电压，所述P方向的偏振光在经过第一液晶层303后，仍然为P方向的偏振光，可以透过第一偏振片301，进入用户的视线；当对所述第二液晶层307施加电压时，S方向的偏振光经过第二液晶层307时不发生偏转，仍然为S方向的偏振光，若不对第一液晶层303施加电压，所述S方向的偏振光在经过第一液晶层303后，变成P方向的偏振光，可以通过第一偏振片301，进入用户的视线，若对第一液晶层303施加电压，所述S方向的偏振光在经过第一液晶层303后，仍然为S方向的偏振光，不能通过第一偏振片301。For ambient light, after the ambient light passes through thethird polarizer 309, only the polarized light in the S direction remains, and when no voltage is applied to the secondliquid crystal layer 307, the polarized light in the S direction in the ambient light passes through the second liquidcrystal layer Layer 307 is deflected, and after passing through the secondliquid crystal layer 307, it becomes polarized light in the P direction. If no voltage is applied to the firstliquid crystal layer 303, the polarized light in the P direction in ambient light passes through the firstliquid crystal layer 303 and becomes The polarized light in the S direction cannot pass through thefirst polarizer 301. If a voltage is applied to the firstliquid crystal layer 303, the polarized light in the P direction is still the polarized light in the P direction after passing through the firstliquid crystal layer 303, and can pass through. Through thefirst polarizer 301, it enters the user's line of sight; when a voltage is applied to the secondliquid crystal layer 307, the polarized light in the S direction does not deflect when passing through the secondliquid crystal layer 307, and is still the polarized light in the S direction. No voltage is applied to the firstliquid crystal layer 303, the polarized light in the S direction becomes the polarized light in the P direction after passing through the firstliquid crystal layer 303, and can pass through thefirst polarizer 301 and enter the user's line of sight. Theliquid crystal layer 303 applies a voltage, and the polarized light in the S direction is still the polarized light in the S direction after passing through the firstliquid crystal layer 303 and cannot pass through thefirst polarizer 301 .

为方便理解本发明的实例1，请参考图4，图4示出了对所述透明液晶显示装置的像素单元的第一液晶层303施加电压，对所述像素单元的第二液晶层307施加电压时，即像素单元呈现黑态显示，透明液晶显示装置的像素单元的工作示意图。For the convenience of understanding Example 1 of the present invention, please refer to FIG. 4, which shows that a voltage is applied to the firstliquid crystal layer 303 of the pixel unit of the transparent liquid crystal display device, and a voltage is applied to the secondliquid crystal layer 307 of the pixel unit. Voltage, that is, the pixel unit displays in a black state, and the working schematic diagram of the pixel unit of the transparent liquid crystal display device.

由于第一偏振片301允许P方向的偏振光通过，第二偏振片311允许S方向的偏振光通过，背光源300（如图3所示）中的S方向的偏振光100透过第二偏振片311后，首先经过透明导光板305，经透明导光板305均匀反射后进入第一液晶层303，由于所述第一液晶层303在施加电压时其内部的液晶分子303a不发生偏转，因此经过第一液晶层303后仍然为S方向的偏振光100不能透过第一偏振片301，即此时背光源300的光线不能透出所述透明液晶显示装置。Since thefirst polarizer 301 allows the polarized light in the P direction to pass through, and thesecond polarizer 311 allows the polarized light in the S direction to pass through, thepolarized light 100 in the S direction in the backlight 300 (as shown in FIG. 3 ) passes through the second polarized light. After thesheet 311, it first passes through the transparentlight guide plate 305, and enters the firstliquid crystal layer 303 after being uniformly reflected by the transparentlight guide plate 305. Since theliquid crystal molecules 303a inside the firstliquid crystal layer 303 do not deflect when a voltage is applied, the After the firstliquid crystal layer 303 , thepolarized light 100 still in the S direction cannot pass through thefirst polarizer 301 , that is, the light from thebacklight 300 cannot pass through the transparent liquid crystal display device at this time.

又由于第三偏振片309允许S方向的偏振光通过，环境光中的S方向的偏振光110透过第三偏振片309后，进入第二液晶层307，由于所述第二液晶层307在施加电压时其内部的液晶分子307a不发生偏转，因此经过第二液晶层307后仍然为S方向的偏振光110，所述S方向的偏振光110透过透明的导光板305，进入第一液晶层303，由于所述第一液晶层303在施加电压时其内部的液晶分子303a不发生偏转，因此经过第一液晶层303后仍然为S方向的偏振光110，所述S方向的偏振光110不能透过第一偏振片301，即此时环境光的光线也不能透出所述透明液晶显示装置。Because thethird polarizer 309 allows the polarized light in the S direction to pass through, thepolarized light 110 in the S direction in the ambient light passes through thethird polarizer 309 and then enters the secondliquid crystal layer 307. When a voltage is applied, theliquid crystal molecules 307a inside it do not deflect, so after passing through the secondliquid crystal layer 307, it is still thepolarized light 110 in the S direction, and thepolarized light 110 in the S direction passes through the transparentlight guide plate 305 and enters the firstliquid crystal Layer 303, since theliquid crystal molecules 303a inside the firstliquid crystal layer 303 do not deflect when a voltage is applied, so after passing through the firstliquid crystal layer 303, it is still thepolarized light 110 in the S direction, and thepolarized light 110 in the S direction It cannot pass through thefirst polarizer 301 , that is, the light of ambient light cannot pass through the transparent liquid crystal display device at this time.

经过上述分析可知，当所述对所述像素单元的第一液晶层303施加电压，对所述像素单元的所述第二液晶层307施加电压时，背光源的光线和环境光均不能透过所述像素单元，像素单元呈黑态（Black State）显示。After the above analysis, it can be seen that when the voltage is applied to the firstliquid crystal layer 303 of the pixel unit and the voltage is applied to the secondliquid crystal layer 307 of the pixel unit, neither the light from the backlight nor the ambient light can pass through. The pixel unit is displayed in a black state (Black State).

现有技术中，如图2所示的透明液晶显示装置，因为第一偏振片201位于导光板203和背光源200之间，所述第一偏振片201可允许偏振方向和其一致的背光通过，经液晶层207后背光不能透过第二偏振片211；但是在阵列基板205的下方没有设置偏光片，因此当像素单元显示黑态时，环境光线中仍有部分透过透明液晶显示装置被用户感知，即现有技术的透明液晶显示装置不能提供真正意义上的黑态；相比于现有技术，本发明的像素单元因可以控制环境光和背光都不透过液晶显示装置而提供完全的黑态。In the prior art, in the transparent liquid crystal display device shown in FIG. 2 , because thefirst polarizer 201 is located between thelight guide plate 203 and thebacklight source 200, thefirst polarizer 201 can allow the backlight with the same polarization direction to pass through. After passing through theliquid crystal layer 207, the backlight cannot pass through thesecond polarizer 211; however, there is no polarizer under thearray substrate 205, so when the pixel unit displays a black state, part of the ambient light still passes through the transparent liquid crystal display device and is captured. User perception, that is, the transparent liquid crystal display device of the prior art cannot provide a true black state; compared with the prior art, the pixel unit of the present invention provides a complete black state.

图5和图6示出的为所述透明液晶显示装置的像素单元为白态显示时的工作原理，白态显示定义为像素单元的亮度最大时的显示状态。一般地，背光源300的亮度要远远地大于环境光的亮度，只要背光源300的光线能最大程度的透过该像素单元的第一偏振片301被用户所感知，所述像素单元即为白态显示。此时，可以选择环境光透过或不透过第一偏振片301。Fig. 5 and Fig. 6 show the working principle of the pixel unit of the transparent liquid crystal display device when it is in the white state display, and the white state display is defined as the display state when the brightness of the pixel unit is maximum. Generally, the brightness of thebacklight 300 is far greater than the brightness of ambient light. As long as the light of thebacklight 300 can pass through thefirst polarizer 301 of the pixel unit to the greatest extent and be perceived by the user, the pixel unit is white state display. At this time, the ambient light can be selected to pass through or not to pass through thefirst polarizer 301 .

请参考图5，图5示出了不对所述像素单元的第一液晶层303施加电压，对所述像素单元的所述第二液晶层307施加电压时，液晶显示面板的像素单元的工作示意图，此时背光和环境光都能透过第一偏振片201。Please refer to FIG. 5. FIG. 5 shows a working diagram of the pixel unit of the liquid crystal display panel when no voltage is applied to the firstliquid crystal layer 303 of the pixel unit and a voltage is applied to the secondliquid crystal layer 307 of the pixel unit. , at this moment, both the backlight and the ambient light can pass through thefirst polarizer 201 .

由于第一偏振片301允许P方向的偏振光通过，第二偏振片311允许S方向的偏振光通过，背光源300（如图3所示）中的S方向的偏振光100透过第二偏振片311后，首先经过透明导光板305，然后进入第一液晶层303，并跟随第一液晶层303内部的液晶分子303a发生偏转，变为P方向的偏振光100a，可以透过第一偏振片301。Since thefirst polarizer 301 allows the polarized light in the P direction to pass through, and thesecond polarizer 311 allows the polarized light in the S direction to pass through, thepolarized light 100 in the S direction in the backlight 300 (as shown in FIG. 3 ) passes through the second polarized light. After thefilm 311, it first passes through the transparentlight guide plate 305, then enters the firstliquid crystal layer 303, and deflects following theliquid crystal molecules 303a inside the firstliquid crystal layer 303, becoming polarized light 100a in the P direction, which can pass through thefirst polarizer 301.

又由于所述第三偏振片309允许S方向的偏振光通过，环境光中的S方向的偏振光110透过第三偏振片309后，进入第二液晶层307，由于所述第二液晶层307在施加电压时其内部的液晶分子307a不发生偏转，因此经过第二液晶层307后仍然为S方向的偏振光110，所述S方向的偏振光110透过透明的导光板305，进入第一液晶层303，由于所述第一液晶层303未施加电压，所述S方向的偏振光110跟随着第一液晶层303内的液晶分子303a发生偏转，变为P方向的偏振光110c，所述P方向的偏振光110c可以透过第一偏振片301。And because thethird polarizer 309 allows the polarized light in the S direction to pass through, thepolarized light 110 in the S direction in the ambient light passes through thethird polarizer 309 and enters the secondliquid crystal layer 307, because the second liquid crystal layer Theliquid crystal molecules 307a inside the 307 do not deflect when a voltage is applied, so after passing through the secondliquid crystal layer 307, thepolarized light 110 in the S direction is stillpolarized light 110, and thepolarized light 110 in the S direction passes through the transparentlight guide plate 305 and enters the secondliquid crystal layer 307. Aliquid crystal layer 303, since no voltage is applied to the firstliquid crystal layer 303, thepolarized light 110 in the S direction is deflected following theliquid crystal molecules 303a in the firstliquid crystal layer 303, and becomespolarized light 110c in the P direction, so Thepolarized light 110c in the P direction can pass through thefirst polarizer 301 .

经过上述分析可知，当不对所述像素单元的第一液晶层303施加电压，对所述像素单元的所述第二液晶层307施加电压时，背光源的光线和环境光的光线均可以透过所述像素单元，然后进入用户的视线，像素单元呈白态（White State）显示。After the above analysis, it can be seen that when no voltage is applied to the firstliquid crystal layer 303 of the pixel unit and a voltage is applied to the secondliquid crystal layer 307 of the pixel unit, both the light from the backlight and the light from ambient light can pass through. The pixel unit then enters the user's line of sight, and the pixel unit is displayed in a white state (White State).

图6为像素单元在呈白态显示的另一种情况，图6示出了不对所述像素单元的第一液晶层303施加电压，也不对所述像素单元的所述第二液晶层307施加电压时，液晶显示面板的工作示意图。Fig. 6 is another case where the pixel unit is displayed in a white state. Fig. 6 shows that no voltage is applied to the firstliquid crystal layer 303 of the pixel unit, nor is voltage applied to the secondliquid crystal layer 307 of the pixel unit. Working schematic diagram of liquid crystal display panel when voltage is applied.

由于第一偏振片301允许P方向的偏振光通过，第二偏振片311允许S方向的偏振光通过，背光源中的S方向的偏振光100透过第二偏振片311后，首先经过透明导光板305，然后进入第一液晶层303，并跟随第一液晶层303内部的液晶分子303a发生偏转，变为P方向的偏振光100a，可以透过第一偏振片301。Since thefirst polarizer 301 allows the polarized light in the P direction to pass through, and thesecond polarizer 311 allows the polarized light in the S direction to pass through, after thepolarized light 100 in the S direction in the backlight passes through thesecond polarizer 311, it first passes through the transparent guide. Thelight plate 305 then enters the firstliquid crystal layer 303 and is deflected following theliquid crystal molecules 303 a inside the firstliquid crystal layer 303 , becoming polarized light 100 a in the P direction, which can pass through thefirst polarizer 301 .

又由于所述第三偏振片309允许S方向的偏振光通过，环境光中的S方向的偏振光110透过第三偏振片309后，进入第二液晶层307，并随着第二液晶层307内的液晶分子307a发生偏转，变成P方向的偏振光110a，然后穿过透明导光板305后，进入第一液晶层303，随着第一液晶层303内的液晶分子303a发生偏振，变为S方向的偏振光110b，由于所述第一偏振片301仅允许P方向的偏振光通过，所述S方向的偏振光110b无法透过第一偏振片301。And because thethird polarizer 309 allows the polarized light in the S direction to pass through, thepolarized light 110 in the S direction in the ambient light passes through thethird polarizer 309, enters the secondliquid crystal layer 307, and along with the second liquid crystal layer Theliquid crystal molecules 307a in the firstliquid crystal layer 307 are deflected and become thepolarized light 110a in the P direction, and then pass through the transparentlight guide plate 305 and enter the firstliquid crystal layer 303. With the polarization of theliquid crystal molecules 303a in the firstliquid crystal layer 303, It is the polarized light 110b in the S direction. Since thefirst polarizer 301 only allows the polarized light in the P direction to pass through, the polarized light 110b in the S direction cannot pass through thefirst polarizer 301 .

经过上述分析可知，当既不对所述像素单元的第一液晶层303施加电压，也不对所述像素单元的所述第二液晶层307施加电压时，背光源的光线可以透过像素单元，进入用户的视线，环境光无法透过像素单元，进入用户的视线。After the above analysis, it can be seen that when no voltage is applied to the firstliquid crystal layer 303 of the pixel unit, and no voltage is applied to the secondliquid crystal layer 307 of the pixel unit, the light from the backlight can pass through the pixel unit and enter the pixel unit. The user's line of sight and ambient light cannot pass through the pixel unit and enter the user's line of sight.

对于液晶显示设备来说，一个显示画面的内容只由像素单元与像素单元之间的差别来表现，才能显示出来，否则就不能被人眼所识别，而最简单的差别就是亮与暗，其间的差别愈大，人眼便愈能感知到，这个差别可以用最亮情况的亮度与最暗情况的亮度之比率作为量化指标，此比率即为对比度。本发明提供的透明液晶显示装置因为能提供完全的黑态，所以相比于现有技术也能提供更高的对比度，提高了显示性能。For liquid crystal display devices, the content of a display screen can only be displayed by the difference between pixel units and pixel units, otherwise it cannot be recognized by human eyes, and the simplest difference is bright and dark. The greater the difference, the more it can be perceived by the human eye. This difference can be quantified by the ratio of the brightness of the brightest case to the brightness of the darkest case. This ratio is the contrast ratio. Because the transparent liquid crystal display device provided by the present invention can provide a complete black state, it can also provide higher contrast than the prior art and improve display performance.

像素单元的明暗的差别即灰阶，可以将像素单元的显示从最亮到最暗增加级别区分，可以说白态显示是灰阶显示的最小灰阶，黑态显示为灰阶显示的最大灰阶，当然除了白态和黑态，还包括在白态和黑态之间多个级别的亮度显示。The difference between the brightness and darkness of the pixel unit is the gray scale, which can distinguish the display of the pixel unit from the brightest to the darkest increase level. It can be said that the white state display is the minimum gray scale of the gray scale display, and the black state display is the maximum gray scale of the gray scale display. , of course, in addition to the white state and the black state, it also includes multiple levels of brightness display between the white state and the black state.

当然，所述透明液晶显示装置适当控制加在第一液晶层303上的电压大小时，所述第一液晶层303的液晶分子303a可偏转一定的角度从而实现不同的除黑态和白态之外的其他灰阶显示；或者同时调节施加于第一液晶层303和第二液晶层307上的电压大小，所述第一液晶层303和第二液晶层307的液晶分子通过偏转一定的角度控制一定的背光或者环境光透过从而显示不同的灰阶。Of course, when the transparent liquid crystal display device properly controls the magnitude of the voltage applied to the firstliquid crystal layer 303, theliquid crystal molecules 303a of the firstliquid crystal layer 303 can be deflected at a certain angle so as to realize different blackout states and white states. Other grayscale display; or adjust the voltage applied to the firstliquid crystal layer 303 and the secondliquid crystal layer 307 at the same time, the liquid crystal molecules of the firstliquid crystal layer 303 and the secondliquid crystal layer 307 are controlled by deflecting a certain angle A certain backlight or ambient light passes through to display different gray scales.

请参考图7，图7示出了对所述像素单元的第一液晶层303施加电压，对所述像素单元的所述第二液晶层307不施加电压时，即像素单元呈透明显示时的工作示意图。Please refer to FIG. 7. FIG. 7 shows a voltage applied to the firstliquid crystal layer 303 of the pixel unit and no voltage applied to the secondliquid crystal layer 307 of the pixel unit, that is, when the pixel unit is transparently displayed. Working diagram.

由于第一偏振片301允许P方向的偏振光通过，第二偏振片311允许S方向的偏振光通过，背光源中的S方向的偏振光100透过第二偏振片311后，首先经由透明导光板305均匀反射后进入第一液晶层303，由于所述第一液晶层303在施加电压时其内部的液晶分子303a不发生偏转，因此经过第一液晶层303后仍然为S方向的偏振光100，所述S方向的偏振光100不能透过第一偏振片301。Since thefirst polarizer 301 allows the polarized light in the P direction to pass through, and thesecond polarizer 311 allows the polarized light in the S direction to pass through, after thepolarized light 100 in the S direction in the backlight passes through thesecond polarizer 311, it first passes through the transparent guide. Thelight plate 305 is evenly reflected and enters the firstliquid crystal layer 303. Since theliquid crystal molecules 303a inside the firstliquid crystal layer 303 do not deflect when a voltage is applied, after passing through the firstliquid crystal layer 303, it is still thepolarized light 100 in the S direction. , thepolarized light 100 in the S direction cannot pass through thefirst polarizer 301 .

又由于第三偏振片309允许S方向的偏振光通过，环境光中的S方向的偏振光110透过第三偏振片309后，进入第二液晶层307，在第二液晶层307不施加电压的情况下，所述S方向的偏振光110随着第二液晶层307内的液晶分子307a发生偏转，变成P方向的偏振光110a，然后穿过透明导光板305后，进入第一液晶层303，由于对第一液晶层303施加了电压，所述第一液晶层303内的液晶分子303a不发生偏转，因此，所述P方向的偏振光110a经过第一液晶层303后，仍然为P方向的偏振光110a，可以透过第一偏振片301。Because thethird polarizer 309 allows the polarized light in the S direction to pass through, thepolarized light 110 in the S direction in the ambient light passes through thethird polarizer 309 and enters the secondliquid crystal layer 307, and no voltage is applied to the secondliquid crystal layer 307 In the case where thepolarized light 110 in the S direction is deflected with theliquid crystal molecules 307a in the secondliquid crystal layer 307, it becomes thepolarized light 110a in the P direction, and then passes through the transparentlight guide plate 305 and enters the firstliquid crystal layer 303, because the voltage is applied to the firstliquid crystal layer 303, theliquid crystal molecules 303a in the firstliquid crystal layer 303 do not deflect, therefore, after thepolarized light 110a in the P direction passes through the firstliquid crystal layer 303, it is still P Thepolarized light 110 a in the direction can pass through thefirst polarizer 301 .

经过上述分析可知，对所述像素单元的第一液晶层303施加电压，对所述像素单元的所述第二液晶层307不施加电压时，背光源300的光线不能通过所述像素单元进入用户的视线，而环境光可以通过所述像素单元进入用户的视线，所述像素单元呈透明态显示。After the above analysis, it can be seen that when a voltage is applied to the firstliquid crystal layer 303 of the pixel unit and no voltage is applied to the secondliquid crystal layer 307 of the pixel unit, the light from thebacklight 300 cannot enter the user through the pixel unit. line of sight, and ambient light can enter the line of sight of the user through the pixel unit, and the pixel unit is displayed in a transparent state.

在现有技术中，透明液晶显示装置如图2所示，在显示白态时是通过控制背光的光线通过透明液晶显示装置被用户感知来实现，此时所述的透明液晶显示装置的所有像素单元的液晶层都有背光的光线进入，并且因为背光的亮度远远高于环境光的亮度，虽然此时可显示亮度较高的白态，但是几乎不能进行透明显示，即置于所述透明液晶显示装置后的物品不能被用户所感知；In the prior art, a transparent liquid crystal display device is shown in Figure 2. When displaying a white state, it is realized by controlling the light of the backlight to be perceived by the user through the transparent liquid crystal display device. At this time, all pixels of the transparent liquid crystal display device The liquid crystal layer of the unit has light from the backlight entering, and because the brightness of the backlight is much higher than the brightness of the ambient light, although it can display a white state with higher brightness at this time, it is almost impossible to perform transparent display, that is, placed in the transparent Items behind the liquid crystal display device cannot be perceived by the user;

本发明提供的透明液晶显示装置具有多个像素单元，每个像素单元都可以单独控制，所以不同的像素单元都可以独立的呈现灰阶或者透明显示，带来更好的显示效果。The transparent liquid crystal display device provided by the present invention has a plurality of pixel units, and each pixel unit can be controlled independently, so different pixel units can independently present grayscale or transparent display, bringing better display effect.

请参考图11，图11为本发明实施例一的透明液晶显示装置显示的示意图。当透明液晶显示装置100’按照本发明的上述方法进行控制时，用户200’站在所述透明液晶显示装置100’的观察侧进行观看，除了能够清楚的看到所述透明的液晶显示装置100’的背侧放置的物体400’外，还能够清晰的看到所述透明液晶显示装置100’上显示的图形300’，因为本发明提供的透明液晶显示装置可以单独控制每个像素单元的显示装置，具体的控制位于物体400’前的各个像素单元呈透明显示，控制显示图形300’部分的像素单元呈相应的灰阶显示，在本实施例中，由于可以通过控制各像素单元的第一液晶层和第二液晶层的电压，在液晶显示面板保持较高透明度的同时，使得显示的图形300’具有较高的对比度。Please refer to FIG. 11 , which is a schematic diagram of a transparent liquid crystal display device according to Embodiment 1 of the present invention. When the transparent liquid crystal display device 100' is controlled according to the above-mentioned method of the present invention, the user 200' stands on the observation side of the transparent liquid crystal display device 100' to watch, except that the transparent liquidcrystal display device 100 can be clearly seen In addition to the object 400' placed on the back side of ', the graphic 300' displayed on the transparent liquid crystal display device 100' can also be clearly seen, because the transparent liquid crystal display device provided by the present invention can individually control the display of each pixel unit The device specifically controls each pixel unit located in front of the object 400' to display transparently, and controls the pixel units in the display graphic 300' to display in corresponding gray scales. In this embodiment, since the first pixel unit of each pixel unit can be controlled The voltages of the liquid crystal layer and the second liquid crystal layer make the displayed graphics 300' have a higher contrast ratio while maintaining a higher transparency of the liquid crystal display panel.

实例2Example 2

请继续参考图3，在本发明的实例2中，与实例1不同，所述第一偏振片301设置为允许P方向的偏振光通过，所述第二偏振片311设置为允许S方向的偏振光通过，所述第三偏振片309设置为允许P方向的偏振光通过。Please continue to refer to FIG. 3 , in Example 2 of the present invention, different from Example 1, thefirst polarizer 301 is set to allow the polarized light in the P direction to pass through, and thesecond polarizer 311 is set to allow the polarization in the S direction The light passes through, and thethird polarizer 309 is set to allow the polarized light in the P direction to pass through.

当不对所述像素单元的第一液晶层303施加电压时，无论是否对第二液晶层307施加电压，背光源300中的光线均可透过所述像素单元的第一偏振片301进入用户的视线，像素单元均呈白态显示；当对所述像素单元的第一液晶层303施加电压，不对所述像素单元的第二液晶层307施加电压时，背光源300中的光线和环境光均无法透过所述像素单元的第一偏振片301，没有光线进入用户的视线，所述像素单元呈黑态显示；当既对所述像素单元的第一液晶层303施加电压，又对所述像素单元的第二液晶层307施加电压时，仅环境光透过所述像素单元的第一偏振片301，进入用户的视线，所述像素单元呈透明态显示，可以透过所述像素单元看到液晶显示面板背后的物体。When no voltage is applied to the firstliquid crystal layer 303 of the pixel unit, no matter whether a voltage is applied to the secondliquid crystal layer 307, the light in thebacklight 300 can pass through thefirst polarizer 301 of the pixel unit and enter the user’s Line of sight, the pixel units are all displayed in a white state; when a voltage is applied to the firstliquid crystal layer 303 of the pixel unit and no voltage is applied to the secondliquid crystal layer 307 of the pixel unit, the light in thebacklight 300 and the ambient light are uniform. Thefirst polarizer 301 that cannot pass through the pixel unit, no light enters the user's line of sight, and the pixel unit is displayed in a black state; when a voltage is applied to the firstliquid crystal layer 303 of the pixel unit, and the When a voltage is applied to the secondliquid crystal layer 307 of the pixel unit, only ambient light passes through thefirst polarizer 301 of the pixel unit and enters the user's line of sight, and the pixel unit is displayed in a transparent state, and can be viewed through the pixel unit. to the object behind the LCD panel.

通过上述分析可知，为了使所述像素单元呈灰阶显示，可以采用如下控制方法：不对所述像素单元的第一液晶层303施加电压，对所述像素单元的第二液晶层307施加电压；或者不对所述像素单元的第一液晶层303施加电压，不对所述像素单元的第二液晶层307施加电压；或者对所述像素单元的第一液晶层303施加电压，不对所述像素单元的第二液晶层307施加电压。From the above analysis, it can be seen that in order to make the pixel unit display in gray scale, the following control method can be adopted: no voltage is applied to the firstliquid crystal layer 303 of the pixel unit, and a voltage is applied to the secondliquid crystal layer 307 of the pixel unit; Either no voltage is applied to the firstliquid crystal layer 303 of the pixel unit, no voltage is applied to the secondliquid crystal layer 307 of the pixel unit; or a voltage is applied to the firstliquid crystal layer 303 of the pixel unit, and no voltage is applied to the The secondliquid crystal layer 307 applies a voltage.

需要说明的是，在施加电压的同时，还可以通过调节施加于第一液晶层303上的电压大小，或者调节施加于第二液晶层307上的电压大小，或者同时调节施加于第一液晶层303和第二液晶层307上的电压大小，以获得上述灰阶显示中的其他中间灰阶。It should be noted that while applying the voltage, it is also possible to adjust the voltage applied to the firstliquid crystal layer 303, or adjust the voltage applied to the secondliquid crystal layer 307, or adjust the voltage applied to the first liquid crystal layer at the same time. 303 and the voltage on the secondliquid crystal layer 307 to obtain other intermediate gray scales in the above gray scale display.

而控制所述像素单元呈透明态显示的方法为：对所述像素单元的第一液晶层303施加电压，对所述像素单元的第二液晶层307施加电压。The method for controlling the pixel unit to display in a transparent state is: applying a voltage to the firstliquid crystal layer 303 of the pixel unit, and applying a voltage to the secondliquid crystal layer 307 of the pixel unit.

本发明提供的透明液晶显示装置，所述透明液晶显示装置具有多个像素单元，所述透明液晶显示装置包括第一液晶层，以及位于所述第一液晶层上方的第一偏振片；位于所述第一液晶层下方的透明导光板；位于所述透明导光板一侧的背光源，所述透明导光板和背光源之间设置有第二偏振片；设置于所述透明导光板下方的第二液晶层，所述第二液晶层的下方设置有第三偏振片。In the transparent liquid crystal display device provided by the present invention, the transparent liquid crystal display device has a plurality of pixel units, the transparent liquid crystal display device includes a first liquid crystal layer, and a first polarizing plate located above the first liquid crystal layer; A transparent light guide plate below the first liquid crystal layer; a backlight located on one side of the transparent light guide plate, a second polarizer is arranged between the transparent light guide plate and the backlight; a second polarizer is arranged under the transparent light guide plate Two liquid crystal layers, a third polarizer is arranged under the second liquid crystal layer.

在像素单元呈透明态显示时，只要通过第一液晶层、第二液晶层、第一偏振片、第二偏振片和第三偏振片，控制背光源的光线经第一液晶层后，不能穿过第一偏振片，而环境光线经第二液晶层、第一液晶层后，可以穿过第一偏振片即可；When the pixel unit is displayed in a transparent state, as long as it passes through the first liquid crystal layer, the second liquid crystal layer, the first polarizer, the second polarizer and the third polarizer, the light from the backlight cannot pass through the first liquid crystal layer. After passing through the first polarizer, the ambient light can pass through the first polarizer after passing through the second liquid crystal layer and the first liquid crystal layer;

在像素单元呈白态显示时，只要通过第一液晶层、第二液晶层、第一偏振片、第二偏振片和第三偏振片，控制背光源的光线经第一液晶层后，可以穿过第一偏振片即可；When the pixel unit is displayed in a white state, as long as it passes through the first liquid crystal layer, the second liquid crystal layer, the first polarizer, the second polarizer, and the third polarizer, the light from the backlight can pass through the first liquid crystal layer and pass through. pass through the first polarizer;

在像素单元呈黑态显示时，只要通过第一液晶层、第二液晶层、第一偏振片、第二偏振片和第三偏振片，控制背光源的光线经第一液晶层后，不能穿过第一偏振片，并且环境光线经第二液晶层、第一液晶层后，也不能穿过第一偏振片即可。When the pixel unit is displayed in a black state, as long as it passes through the first liquid crystal layer, the second liquid crystal layer, the first polarizer, the second polarizer and the third polarizer, the light from the backlight cannot pass through the first liquid crystal layer. It only needs to pass through the first polarizer, and the ambient light cannot pass through the first polarizer after passing through the second liquid crystal layer and the first liquid crystal layer.

因为液晶具备旋光性，可以使进入其中的光线发生偏转，再配合置于液晶层上下两侧的偏转片，可控制一定角度的偏振光进入或透出所述液晶层，所以本发明透明液晶显示装置的第一液晶层、第二液晶层的模式以及第一偏振片、第二偏振片和第三偏振片的类型并不局限于以上实例1和实例2所限定的内容，任何本领域技术人员在不脱离本发明的精神和范围内，都可以利用上述揭示的方法和技术内容对本发明技术方案做出可能的变动和修改，因此，凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化及修饰，均属于本发明技术方案的保护范围。Because the liquid crystal has optical rotation, it can deflect the light entering it, and with the deflection plates placed on the upper and lower sides of the liquid crystal layer, it can control the polarized light at a certain angle to enter or pass through the liquid crystal layer, so the transparent liquid crystal display of the present invention The first liquid crystal layer of the device, the mode of the second liquid crystal layer and the types of the first polarizer, the second polarizer and the third polarizer are not limited to the content defined in the above example 1 and example 2, any person skilled in the art Without departing from the spirit and scope of the present invention, the above disclosed methods and technical content can be used to make possible changes and modifications to the technical solution of the present invention. In essence, any simple modifications, equivalent changes and modifications made to the above embodiments belong to the protection scope of the technical solution of the present invention.

第二实施例second embodiment

在第一实施例所示的结构上，本发明第二实施例的透明液晶显示装置还包括：第一上基板和第一下基板，所述第一液晶层夹于第一上基板和第一下基板之间，形成第一液晶面板；第二上基板和第二下基板，所述第二液晶层夹于第二上基板和第二下基板之间形成第二液晶面板。Based on the structure shown in the first embodiment, the transparent liquid crystal display device of the second embodiment of the present invention further includes: a first upper substrate and a first lower substrate, and the first liquid crystal layer is sandwiched between the first upper substrate and the first lower substrate. A first liquid crystal panel is formed between the lower substrates; a second upper substrate and a second lower substrate, and the second liquid crystal layer is sandwiched between the second upper substrate and the second lower substrate to form a second liquid crystal panel.

请参考图8，本发明第二实施例的透明液晶显示装置包括：Please refer to FIG. 8, the transparent liquid crystal display device according to the second embodiment of the present invention includes:

第一下基板413、第一上基板415以及设置于所述第一下基板413、第一上基板415之间的第一液晶层403，形成第一液晶面板；The first lower substrate 413, the first upper substrate 415, and the first liquid crystal layer 403 disposed between the first lower substrate 413 and the first upper substrate 415 form a first liquid crystal panel;

位于所述第一上基板415上方的第一偏振片401；a first polarizer 401 located above the first upper substrate 415;

位于所述第一下基板413下方的透明导光板405；a transparent light guide plate 405 located below the first lower substrate 413;

位于所述透明导光板405一侧的背光源400，所述背光源400和透明导光板405之间设置有第二偏振片411；A backlight 400 located on one side of the transparent light guide plate 405, a second polarizer 411 is arranged between the backlight 400 and the transparent light guide plate 405;

第二下基板417、第二上基板419以及设置于所述第二下基板417、第二上基板419之间的第二液晶层407，形成第二液晶面板；The second lower substrate 417, the second upper substrate 419, and the second liquid crystal layer 407 disposed between the second lower substrate 417 and the second upper substrate 419 form a second liquid crystal panel;

位于所述第二阵列基板417下方的第三偏振片409。The third polarizer 409 located below the second array substrate 417 .

其中，所述第一液晶层403为常白的TN型液晶显示模式；所述第一偏振片401设置为允许P方向或S方向的偏振光通过；所述第二偏振片411设置为允许P方向或S方向的偏振光通过；所述第三偏振片409设置为允许P方向或S方向的偏振光通过。具体详情请参考本发明的第一实施例，在此不再赘述。Wherein, the first liquid crystal layer 403 is a normally white TN liquid crystal display mode; the first polarizer 401 is set to allow polarized light in the P direction or S direction to pass through; the second polarizer 411 is set to allow the P The polarized light in the direction or S direction passes through; the third polarizer 409 is set to allow the polarized light in the P direction or the S direction to pass through. For specific details, please refer to the first embodiment of the present invention, which will not be repeated here.

所述第一下基板413和第一上基板415用于控制第一液晶层403内液晶分子的偏转。请结合参考图9，所述第一下基板413为阵列基板。所述第一下基板413靠近第一液晶层403的一侧设置有多条相互平行的第一扫描线G11、G12、G13等，和多条与所述第一扫描线垂直的第一数据线S11、S12、S13、S14、S15、S16等，所述多条第一扫描线G11、G12、G13和第一数据线S11、S12、S13、S14、S15、S16交叉限定多个第一子像素单元500。The first lower substrate 413 and the first upper substrate 415 are used to control the deflection of liquid crystal molecules in the first liquid crystal layer 403 . Please refer to FIG. 9 , the first lower substrate 413 is an array substrate. The side of the first lower substrate 413 close to the first liquid crystal layer 403 is provided with a plurality of first scanning lines G11, G12, G13, etc. parallel to each other, and a plurality of first data lines perpendicular to the first scanning lines. S11, S12, S13, S14, S15, S16, etc., the plurality of first scan lines G11, G12, G13 and the first data lines S11, S12, S13, S14, S15, S16 intersect to define a plurality of firstsub-pixels Unit 500.

如图9所示，每个第一子像素单元500包括：薄膜晶体管1001和像素电极1002，所述薄膜晶体管1001与所述像素单元对应的第一数据线S11和第一扫描线G11电连接，所述薄膜晶体管1001作为开关，用于控制对应的像素电极1002上的像素电压；同时所述第一上基板415朝向第一液晶层403设置有公共电极并具备公共电压，所述像素电压和公共电压共同控制所述第一液晶层403的液晶分子。同时，所述第一上基板415为彩膜基板可实现彩色显示，由于彩膜基板已为本领域技术人员所熟知，在此不再赘述。As shown in FIG. 9, eachfirst sub-pixel unit 500 includes: athin film transistor 1001 and apixel electrode 1002, thethin film transistor 1001 is electrically connected to the first data line S11 and the first scan line G11 corresponding to the pixel unit, Thethin film transistor 1001 is used as a switch for controlling the pixel voltage on thecorresponding pixel electrode 1002; at the same time, the first upper substrate 415 is provided with a common electrode facing the first liquid crystal layer 403 and has a common voltage, and the pixel voltage and the common The voltages jointly control the liquid crystal molecules of the first liquid crystal layer 403 . At the same time, the first upper substrate 415 is a color filter substrate to realize color display, since the color filter substrate is well known to those skilled in the art, details will not be repeated here.

可选地，所述第一液晶面板还可以为其他显示模式，比如IPS（In-PlaneSwitching，平面转换）型液晶面板、FFS（Fringe Field Switching，边缘场开关）型液晶显示面板或者其他类型的液晶显示面板。所述IPS型液晶面板或者FFS型液晶显示面板和TN型液晶面板一样，也是利用液晶的旋光性来控制光线的偏转，同时还具备更广的视角，具有更好的图像信息显示效果。Optionally, the first liquid crystal panel can also be in other display modes, such as IPS (In-Plane Switching, in-plane switching) type liquid crystal display panel, FFS (Fringe Field Switching, fringe field switching) type liquid crystal display panel or other types of liquid crystal display. display panel. Like the TN-type liquid crystal panel, the IPS liquid crystal panel or FFS liquid crystal display panel also uses the optical rotation of liquid crystal to control the deflection of light, and also has a wider viewing angle and better image information display effect.

请继续结合参考图8，所述第二下基板417和第二上基板419，所述第二液晶层407夹于第二下基板417和第二上基板419之间形成第二液晶面板。Please continue to refer to FIG. 8 , the second lower substrate 417 and the second upper substrate 419 , and the second liquid crystal layer 407 is sandwiched between the second lower substrate 417 and the second upper substrate 419 to form a second liquid crystal panel.

根据驱动类型，所述第二液晶面板可以设置为主动驱动型液晶面板或被动驱动型液晶面板。According to the driving type, the second liquid crystal panel can be configured as an actively driven liquid crystal panel or a passively driven liquid crystal panel.

如果第二液晶面板为主动驱动型液晶面板，其也能像第一液晶显示面板一样，不但能控制光线的通过与否，还能调节灰阶亮度。在透明显示时，可以调节环境光的强弱，具有较好的显示效果。If the second liquid crystal panel is an actively driven liquid crystal panel, like the first liquid crystal display panel, it can not only control whether the light passes through, but also adjust the grayscale brightness. In transparent display, the intensity of ambient light can be adjusted, which has a better display effect.

当所述第二液晶面板为主动驱动型液晶面板时，所述第二下基板417为阵列基板，其靠近第二液晶层407的一侧设置有多条相互平行的第二扫描线（未图示），和多条与所述第二扫描线垂直的第二数据线（未图示），所述多条第二扫描线和第二数据线交叉限定多个第二子像素单元，每个第二子像素单元也包括薄膜晶体管和像素电极，并且通过所述像素电极和第二上基板419的公共电极一起来控制第二液晶层407的偏转（未图示）。When the second liquid crystal panel is an actively driven liquid crystal panel, the second lower substrate 417 is an array substrate, and a plurality of second scanning lines parallel to each other are provided on the side close to the second liquid crystal layer 407 (not shown in the figure). shown), and a plurality of second data lines (not shown) perpendicular to the second scan line, the plurality of second scan lines and second data lines intersect to define a plurality of second sub-pixel units, each The second sub-pixel unit also includes a thin film transistor and a pixel electrode, and the deflection of the second liquid crystal layer 407 is controlled through the pixel electrode and the common electrode of the second upper substrate 419 (not shown).

优选的，所述第二子像素单元位于所述第一液晶面板中的第一子像素单元500（如图9所示）的正下方、且一一对应，所述一一对应是指所述第一子像素单元500和第二子像素单元的透光部分最大程度上重叠，比如可将第一子像素单元500和第二子像素单元设计成为完全相同的形状，将不透光的地方重叠，透光部分也进行重叠，最大程度上减小亮度的损失。Preferably, the second sub-pixel unit is located directly below the first sub-pixel unit 500 (as shown in FIG. 9 ) in the first liquid crystal panel, and is in one-to-one correspondence, and the one-to-one correspondence refers to the The light-transmitting parts of thefirst sub-pixel unit 500 and the second sub-pixel unit overlap to the greatest extent, for example, thefirst sub-pixel unit 500 and the second sub-pixel unit can be designed to have exactly the same shape, and the opaque parts overlap , the light-transmitting parts are also overlapped to minimize the loss of brightness.

如果只考虑控制环境光线的通过与否，而不需要调节其被人眼所感知的亮度，所述第二液晶面板可选择被动驱动型液晶面板。If it is only considered to control the passing of ambient light without adjusting the brightness perceived by human eyes, the second liquid crystal panel may be a passively driven liquid crystal panel.

请结合参考图8和图10（为便于理解，图10中未示出第二上基板和第二下基板），当所述第二液晶面板为被动驱动型液晶面板时，所述第二上基板417靠近第二液晶层407的一侧设置有多条相互平行的第一电极601，所述第二下基板419靠近第二液晶层407的一侧设置有多条相互平行的第二电极603，所述第一电极601垂直于所述第二电极603，所述第一电极601和第二电极603形成多个交叉区域，所述多个交叉区域形成第二子像素单元605。Please refer to Figure 8 and Figure 10 in conjunction (for ease of understanding, the second upper substrate and the second lower substrate are not shown in Figure 10), when the second liquid crystal panel is a passively driven liquid crystal panel, the second upper The side of the substrate 417 close to the second liquid crystal layer 407 is provided with a plurality of parallelfirst electrodes 601, and the side of the second lower substrate 419 close to the second liquid crystal layer 407 is provided with a plurality of parallelsecond electrodes 603 , thefirst electrode 601 is perpendicular to thesecond electrode 603 , thefirst electrode 601 and thesecond electrode 603 form a plurality of intersecting regions, and the plurality of intersecting regions form asecond sub-pixel unit 605 .

在每个第二子像素单元605中，第二液晶层407的液晶分子夹在彼此垂直的第一电极601和第二电极之间603，被动驱动型液晶显示面板输入的驱动信号依次去驱动每一条的第一电极601和第二电极603，于是当某一条第一电极601以及和它交叉的一条第二电极603被选定的时候，所述第一电极601和第二电极603的交叉点上的第二子像素单元605的液晶分子被驱动偏转，可控制光线的偏转。被动驱动型液晶显示面板的价格便宜，可降低产品的成本。In eachsecond sub-pixel unit 605, the liquid crystal molecules of the second liquid crystal layer 407 are sandwiched between thefirst electrode 601 and thesecond electrode 603 perpendicular to each other, and the driving signal input by the passive driving type liquid crystal display panel sequentially drives each Afirst electrode 601 and asecond electrode 603, so when a certainfirst electrode 601 and asecond electrode 603 intersecting with it are selected, the intersection of thefirst electrode 601 and thesecond electrode 603 The liquid crystal molecules of thesecond sub-pixel unit 605 above are driven to deflect, which can control the deflection of light. The price of the passively driven liquid crystal display panel is cheap, which can reduce the cost of the product.

所述第二液晶面板中的第二子像素单元605位于所述第一液晶面板中的第一子像素单元500（如图9所示）的正下方、且与所述第一子像素单元500一一对应。Thesecond sub-pixel unit 605 in the second liquid crystal panel is located directly below the first sub-pixel unit 500 (as shown in FIG. 9 ) in the first liquid crystal panel, and is connected to thefirst sub-pixel unit 500 One to one correspondence.

为了使所述环境光能够透过第二液晶面板的第二子像素单元605，所述第一电极601和第二电极603的材料为透明材料，例如氧化铟锡。In order to allow the ambient light to pass through thesecond sub-pixel unit 605 of the second liquid crystal panel, the material of thefirst electrode 601 and thesecond electrode 603 is a transparent material, such as indium tin oxide.

本发明虽然已以较佳实施例公开如上，但其并不是用来限定本发明，任何本领域技术人员在不脱离本发明的精神和范围内，都可以利用上述揭示的方法和技术内容对本发明技术方案做出可能的变动和修改，因此，凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化及修饰，均属于本发明技术方案的保护范围。Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention, and any person skilled in the art can use the methods disclosed above and technical content to analyze the present invention without departing from the spirit and scope of the present invention. Possible changes and modifications are made in the technical solution. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention, which do not depart from the content of the technical solution of the present invention, all belong to the technical solution of the present invention. protected range.

Claims (19)

1. transparent liquid crystal display device, described transparent liquid crystal display device has a plurality of pixel cells, it is characterized in that, and described transparent liquid crystal display device comprises:

First liquid crystal layer, and first polaroid that is positioned at described first liquid crystal layer top;

Be positioned at the transparent light guide plate of described first liquid crystal layer below;

Be positioned at the backlight of described transparent light guide plate one side, be provided with second polaroid between described transparent light guide plate and the backlight;

Be arranged at second liquid crystal layer of described transparent light guide plate below, the below of described second liquid crystal layer is provided with the 3rd polaroid.

2. transparent liquid crystal display device as claimed in claim 1, it is characterized in that, a plurality of pixel cells of described transparent liquid crystal display device can be the GTG demonstration respectively or clear state shows, make described transparent liquid crystal display device subregion display graphics and subregion transparent.

3. transparent liquid crystal display device as claimed in claim 2 is characterized in that, when described pixel cell is the clear state demonstration, the light of backlight is behind first liquid crystal layer, can not pass first polaroid, and ambient light passes first polaroid behind second liquid crystal layer, first liquid crystal layer.

4. transparent liquid crystal display device as claimed in claim 2 is characterized in that, described GTG shows and comprises white attitude demonstration and deceive the attitude demonstration.

5. transparent liquid crystal display device as claimed in claim 4 is characterized in that, when described pixel cell is white attitude and shows, when the light of backlight behind first liquid crystal layer, pass first polaroid.

6. transparent liquid crystal display device as claimed in claim 4 is characterized in that, described pixel cell is when attitude shows darkly, the light of backlight is behind first liquid crystal layer, can not pass first polaroid, and ambient light can not pass first polaroid behind second liquid crystal layer, first liquid crystal layer.

7. transparent liquid crystal display device as claimed in claim 1 is characterized in that, also comprises: first upper substrate and first infrabasal plate, described first liquid crystal layer is sandwiched between first upper substrate and first infrabasal plate, forms first liquid crystal panel.

8. transparent liquid crystal display device as claimed in claim 7 is characterized in that, described first upper substrate is color membrane substrates.

9. transparent liquid crystal display device as claimed in claim 7 is characterized in that, described first liquid crystal panel is active drive type liquid crystal panel.

10. transparent liquid crystal display device as claimed in claim 9 is characterized in that, described first liquid crystal panel can be display modes such as TN type, FFS type or IPS type.

11. transparent liquid crystal display device as claimed in claim 9, it is characterized in that, described first infrabasal plate is array base palte, described first infrabasal plate is provided with many first sweep traces that are parallel to each other in the side near first liquid crystal layer, with many first data lines vertical with described first sweep trace, described many first sweep traces and first data line intersection limit a plurality of first sub-pixel unit.

12. transparent liquid crystal display device as claimed in claim 11 is characterized in that, also comprises: second upper substrate and second infrabasal plate, described second liquid crystal layer are sandwiched in and form second liquid crystal panel between second upper substrate and second infrabasal plate.

13. transparent liquid crystal display device as claimed in claim 12 is characterized in that, described second liquid crystal panel is active drive type liquid crystal panel.

14. transparent liquid crystal display device as claimed in claim 13 is characterized in that, described second liquid crystal panel can be display modes such as TN type, FFS type or IPS type.

15. transparent liquid crystal display device as claimed in claim 13, it is characterized in that, described second infrabasal plate is provided with many second sweep traces that are parallel to each other near a side of second liquid crystal layer, with many second data lines vertical with described second sweep trace, described many second sweep traces and second data line intersection limit a plurality of second sub-pixel unit.

16. transparent liquid crystal display device as claimed in claim 15 is characterized in that, described first sub-pixel unit and described second sub-pixel unit be corresponding the setting one by one.

17. transparent liquid crystal display device as claimed in claim 12 is characterized in that, described second liquid crystal panel is the passive driving type liquid crystal panel.

18. transparent liquid crystal display device as claimed in claim 17, it is characterized in that, described second upper substrate is provided with many first electrodes that are parallel to each other near a side of second liquid crystal layer, described second infrabasal plate is provided with many second electrodes that are parallel to each other near a side of second liquid crystal layer, described first electrode is perpendicular to described second electrode, and the zone that described first electrode and second electrode intersect forms a plurality of second sub-pixel unit.

19. transparent liquid crystal display device as claimed in claim 18 is characterized in that, described first sub-pixel unit and described second sub-pixel unit be corresponding the setting one by one.

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