CN102914899A - Double-sided display device - Google Patents

Abstract

Translated fromChinese

本发明涉及液晶显示技术领域，特别涉及一种双面显示装置，用于实现单面、双面显示或透明显示。本发明公开了一种双面显示装置，包括：两个相背对设置的PDLC显示器，其中，每一个PDLC显示器包括具有像素电极的TFT阵列基板，与TFT阵列基板位置相对的公共电极基板，位于TFT阵列基板和公共电极基板之间的PDLC层；位于两个TFT阵列基板之间的调色器；其中，调色器包括：位置相对的两个透明电极层，位于两个透明电极层之间可切换透明态和黑色态的调色层。利用调色器可切换透明态和黑色态的特性，以及PDLC显示器可切换透明态和散射态的特性，使双面显示装置既具有单面和双面显示功能，又具有透明显示功能。

The invention relates to the technical field of liquid crystal display, in particular to a double-sided display device for realizing single-sided, double-sided display or transparent display. The invention discloses a double-sided display device, comprising: two PDLC displays opposite to each other, wherein each PDLC display includes a TFT array substrate with pixel electrodes, and a common electrode substrate opposite to the TFT array substrate is located at The PDLC layer between the TFT array substrate and the common electrode substrate; the toner located between the two TFT array substrates; wherein the toner includes: two transparent electrode layers opposite to each other, located between the two transparent electrode layers Toning layers that can switch transparent and black states. Utilizing the switchable transparent state and black state of the toner, and the switchable transparent state and scattering state of the PDLC display, the double-sided display device has both single-sided and double-sided display functions and transparent display functions.

Description

Translated fromChinese

一种双面显示装置A double-sided display device

技术领域technical field

本发明涉及液晶显示技术领域，特别涉及一种双面显示装置。The invention relates to the technical field of liquid crystal display, in particular to a double-sided display device.

背景技术Background technique

随着液晶显示技术的不断发展，在机场候机厅、火车站候车厅或大型展览馆的信息显示板，或在通讯行业、政府窗口、金融行业、交通行业等窗口行业的营业厅使用的信息显示板，一般都采用双面显示装置，以便于用户获得所需信息。现有的双面显示装置一般包括：相对设置的两个单面显示器对贴而成，每一个液晶显示器都独自对应一个驱动电路，使该双面显示装置可实现单面或双面的画面显示。With the continuous development of liquid crystal display technology, information display panels used in airport waiting halls, railway station waiting halls or large exhibition halls, or in business halls of communication industry, government window, financial industry, transportation industry and other window industries The display panel generally adopts a double-sided display device, so that the user can obtain the required information. Existing double-sided display devices generally include: two single-sided displays facing each other are pasted together, and each liquid crystal display corresponds to a driving circuit independently, so that the double-sided display device can realize single-sided or double-sided screen display .

不过，随着用户要求的提高，例如：要求双面显示装置在工作模式时可实现单面或双面的显示功能，在工作模式之外要求双面显示装置是透明的，或者，为了节省占用空间，可将双面显示装置安装窗户上，在工作模式时可实现单面或双面的显示功能，在非工作模式时不能影响窗户的透光；而目前的双面显示装置不具有透明显示功能。However, with the improvement of user requirements, for example: the double-sided display device is required to realize the single-sided or double-sided display function in the working mode, and the double-sided display device is required to be transparent outside the working mode, or, in order to save occupancy space, the double-sided display device can be installed on the window, which can realize single-sided or double-sided display function in the working mode, and can not affect the light transmission of the window in the non-working mode; and the current double-sided display device does not have a transparent display Function.

发明内容Contents of the invention

本发明的目的在于提供一种既可实现单面显示或双面显示，又可实现透明显示的双面显示装置。The object of the present invention is to provide a double-sided display device capable of realizing single-sided display or double-sided display, and transparent display.

为了达到上述目的，本发明提供以下技术方案：In order to achieve the above object, the present invention provides the following technical solutions:

一种双面显示装置，包括：A double-sided display device, comprising:

两个相背对设置的聚合物分散液晶（Polymer Dispersed Liquid Crystal，以下简称PDLC）显示器；其中，每一个PDLC显示器包括：具有像素电极的薄膜晶体管（Thin Film Transistor，以下简称TFT）阵列基板，与所述TFT阵列基板相对设置的公共电极基板，以及位于所述TFT阵列基板和所述公共电极基板之间、可切换透明态和散射态的PDLC层；Two polymer dispersed liquid crystal (Polymer Dispersed Liquid Crystal, hereinafter referred to as PDLC) displays arranged opposite to each other; wherein, each PDLC display includes: a thin film transistor (Thin Film Transistor, hereinafter referred to as TFT) array substrate with pixel electrodes, and A common electrode substrate opposite to the TFT array substrate, and a PDLC layer between the TFT array substrate and the common electrode substrate that can switch between a transparent state and a scattering state;

位于两个所述TFT阵列基板之间的调色器；其中，所述调色器包括：相对设置的两个透明电极层，位于所述两个透明电极层之间可切换透明态和黑色态的调色层。A toner located between two TFT array substrates; wherein, the toner includes: two transparent electrode layers oppositely arranged, and a transparent state and a black state can be switched between the two transparent electrode layers color layer.

优选地，所述PDLC层包括：第一聚合物基体，位于所述第一聚合物基体中的第一液晶分子和二向色性染料。Preferably, the PDLC layer includes: a first polymer matrix, first liquid crystal molecules and dichroic dyes located in the first polymer matrix.

优选地，所述第一液晶分子为向列相液晶或近晶相液晶。Preferably, the first liquid crystal molecules are nematic liquid crystals or smectic liquid crystals.

优选地，所述PDLC层处于散射态时显示彩色。Preferably, the PDLC layer exhibits color when in a scattering state.

优选地，所述两个透明电极层分别置于两个所述TFT阵列基板上。Preferably, the two transparent electrode layers are respectively placed on the two TFT array substrates.

优选地，所述调色层包括：第二聚合物基体，位于所述第二聚合物基体中的第二液晶分子和黑色染料。Preferably, the toning layer includes: a second polymer matrix, second liquid crystal molecules and black dye located in the second polymer matrix.

较佳地，所述第二液晶分子为向列相液晶、近晶相液晶或胆甾相液晶。Preferably, the second liquid crystal molecules are nematic liquid crystals, smectic liquid crystals or cholesteric liquid crystals.

进一步地，所述双面显示装置还包括：分别与所述两个PDLC显示器和所述调色器连接的三个驱动电路。Further, the double-sided display device further includes: three driving circuits respectively connected to the two PDLC displays and the toner.

在本发明提供的双面显示装置中，调色器具有两种光学状态：透明态和黑色态；当调色器呈黑色态时，可作为两个PDLC显示器的基底，用以增加每个PDLC显示器的对比度；每一个PDLC显示器在对应的驱动电路控制之下，可实现画面显示，更具体说，调色器在断电状态下，第二液晶分子在第二聚合物基体中无规则排列，调色器呈黑色态，两个PDLC显示器在各自的驱动电路的控制下，实现单面或双面显示；调色器在通电状态下，第二液晶分子在第二聚合物基体中有规则排列，调色器呈透明态，每一个PDLC显示器在对应驱动电路的控制之下，可实现透明显示，也就是说，双面显示装置在调色器通电的条件下，通过各自的驱动电路控制两个PDLC显示器，可实现透明显示功能。In the double-sided display device provided by the present invention, the toner has two optical states: a transparent state and a black state; when the toner is in a black state, it can be used as the base of two PDLC displays to increase the The contrast of the display; each PDLC display can realize the screen display under the control of the corresponding driving circuit. More specifically, when the toner is in the power-off state, the second liquid crystal molecules are randomly arranged in the second polymer matrix, The toner is in a black state, and the two PDLC displays can realize single-sided or double-sided display under the control of their respective drive circuits; when the toner is powered on, the second liquid crystal molecules are regularly arranged in the second polymer matrix , the toner is in a transparent state, and each PDLC display can realize transparent display under the control of the corresponding driving circuit, that is to say, the double-sided display device controls the two sides through the respective driving circuit under the condition that the toner is powered on. A PDLC display can realize transparent display function.

附图说明Description of drawings

图1为本发明实施例中双面显示装置未通电状态下的截面图；FIG. 1 is a cross-sectional view of a double-sided display device in an embodiment of the present invention when it is not powered on;

图2为本发明实施例中双面显示装置通电状态下的截面图。FIG. 2 is a cross-sectional view of a double-sided display device in an electrified state in an embodiment of the present invention.

具体实施方式Detailed ways

现有的双面显示装置仅具有单面或双面的显示功能，不具有透明显示功能。Existing double-sided display devices only have a single-sided or double-sided display function, and do not have a transparent display function.

鉴于此，本发明提供了一种双面显示装置，包括：In view of this, the present invention provides a double-sided display device, comprising:

两个相背对设置的PDLC显示器；其中，每一个所述PDLC显示器包括：具有像素电极的TFT阵列基板，与所述TFT阵列基板位置相对的公共电极基板，以及位于所述TFT阵列基板和所述公共电极基板之间、可切换透明态和散射态的PDLC层；Two PDLC displays opposite to each other; wherein, each of the PDLC displays includes: a TFT array substrate with pixel electrodes, a common electrode substrate opposite to the TFT array substrate, and a substrate located between the TFT array substrate and the TFT array substrate. A PDLC layer between the common electrode substrates, switchable transparent state and scattering state;

位于两个所述TFT阵列基板之间的调色器；其中，所述调色器包括：位置相对的两个透明电极层，位于所述两个透明电极层之间可切换透明态和黑色态的调色层。A toner located between two TFT array substrates; wherein, the toner includes: two transparent electrode layers opposite to each other, and a transparent state and a black state can be switched between the two transparent electrode layers color layer.

本发明利用PDLC显示器能够呈现透射态和散射态两种不同的光学状态的特性，以及调色器可切换透明态和黑色态的特性，使该双面显示装置既具有单面或双面的显示功能，又具有透明显示功能。The present invention utilizes the characteristic that the PDLC display can present two different optical states of the transmission state and the scattering state, and the characteristic that the toner can switch the transparent state and the black state, so that the double-sided display device has both single-sided or double-sided display Function, but also has a transparent display function.

为了使本领域技术人员更好的理解本发明的技术方案，下面结合说明书附图对本发明实施例进行详细的描述。In order to enable those skilled in the art to better understand the technical solutions of the present invention, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

如图1、图2所示，本发明提供了一种双面显示装置，包括：第一PDLC显示器，与第一PDLC显示器相背对设置的第二PDLC显示器，以及位于第一PDLC显示器和第二PDLC显示器之间的调色器；其中，As shown in Figure 1 and Figure 2, the present invention provides a double-sided display device, including: a first PDLC display, a second PDLC display opposite to the first PDLC display, and a second PDLC display located between the first PDLC display and the second PDLC display. A color palette between two PDLC displays; where,

第一PDLC显示器包括：具有像素电极的第一TFT阵列基板100，与第一TFT阵列基板100相对设置的第一公共电极基板120，以及位于第一TFT阵列基板100和第一公共电极基板120之间、可切换透明态和散射态的第一PDLC层110；The first PDLC display includes: a firstTFT array substrate 100 having pixel electrodes, a firstcommon electrode substrate 120 opposite to the firstTFT array substrate 100, and a firstcommon electrode substrate 120 located between the firstTFT array substrate 100 and the firstcommon electrode substrate 120. Afirst PDLC layer 110 that can switch between a transparent state and a scattering state;

第二PDLC显示器包括：具有像素电极的第二TFT阵列基板300，与第二TFT阵列基板300相对设置的第二公共电极基板320，以及位于第二TFT阵列基板300和第二公共电极基板320之间、可切换透明态和散射态的第二PDLC层310；The second PDLC display includes: a secondTFT array substrate 300 having pixel electrodes, a secondcommon electrode substrate 320 opposite to the secondTFT array substrate 300, and a secondTFT array substrate 300 located between the second common electrode substrate 320 Asecond PDLC layer 310 that can switch between a transparent state and a scattering state;

调色器位于第一TFT阵列基板100和第二TFT阵列基板300之间，包括：第一透明电极层200，与第一透明电极层200位置相对的第二透明电极层220，位于第一透明电极层200和第二透明电极层220之间可切换透明态和黑色态的调色层210。The toner is located between the firstTFT array substrate 100 and the secondTFT array substrate 300, including: a firsttransparent electrode layer 200, a secondtransparent electrode layer 220 opposite to the firsttransparent electrode layer 200, located on the firsttransparent electrode layer 200 Between theelectrode layer 200 and the secondtransparent electrode layer 220 , thetoning layer 210 can be switched between a transparent state and a black state.

具体地，因第一PDLC显示器和第二PDLC显示器为相同的结构，下面以第一PDLC显示器为例进行描述。其中，第一TFT阵列基板100、第一公共电极基板120和第二TFT阵列基板300、第二公共电极基板320，具体结构和功能为本领域技术人员所熟知，这里不再详细描述。Specifically, since the first PDLC display and the second PDLC display have the same structure, the first PDLC display is taken as an example for description below. The specific structures and functions of the firstTFT array substrate 100 , the firstcommon electrode substrate 120 , the secondTFT array substrate 300 , and the secondcommon electrode substrate 320 are well known to those skilled in the art, and will not be described in detail here.

优选地，参见图1、图2，第一PDLC层110和包括：第一聚合物基体111，位于第一聚合物基体111中的第一液晶分子112和二向色性染料113。其中，第一液晶分子112为向列相液晶或近晶相液晶；二向色性染料113包括红、绿、蓝三原色，在第一PDLC层110处于散射态时显示彩色。更具体地说，第一液晶分子112和二向色性染料113以微滴的形态均匀的分散在第一聚合物基体111中，第一聚合物基体111为微滴提供了稳定的网络结构；当对第一PDLC显示器施加驱动电压时，第一液晶分子112和二向色性染料113在电场的作用下有规则排列，微滴的折射率与第一聚合物基体111的折射率相匹配，此时第一PDLC层110呈透明态；当未对第一PDLC显示器施加驱动电压时，第一液晶分子112和二向色性染料113无规则排列，因第一液晶分子112的折射率是各向异性的，使微滴的折射率与第一聚合物基体111的折射率不匹配，此时第一PDLC层110呈散射态；同时因二向色性染料113的存在，当第一PDLC层110处于散射态时，第一PDLC显示器显示彩色。因此，第一PDLC层110具有显著的光电特性，能够呈现透射态和散射态两种不同的光学状态；与传统的扭曲液晶显示器相比，采用第一PDLC层110制作的PDLC显示器的优势在于不需要偏光片和取向层，制备工艺简单，易制成柔性大面积的第一PDLC显示器。Preferably, referring to FIG. 1 and FIG. 2 , thefirst PDLC layer 110 includes: afirst polymer matrix 111 , firstliquid crystal molecules 112 anddichroic dyes 113 located in thefirst polymer matrix 111 . Wherein, the firstliquid crystal molecules 112 are nematic liquid crystals or smectic liquid crystals; thedichroic dyes 113 include three primary colors of red, green and blue, and display colors when thefirst PDLC layer 110 is in a scattering state. More specifically, the firstliquid crystal molecules 112 and thedichroic dye 113 are uniformly dispersed in thefirst polymer matrix 111 in the form of droplets, and thefirst polymer matrix 111 provides a stable network structure for the droplets; When a driving voltage is applied to the first PDLC display, the firstliquid crystal molecules 112 and thedichroic dyes 113 are regularly arranged under the action of the electric field, and the refractive index of the droplets matches the refractive index of thefirst polymer matrix 111, At this time, thefirst PDLC layer 110 is in a transparent state; when no driving voltage is applied to the first PDLC display, the firstliquid crystal molecules 112 and thedichroic dyes 113 are arranged randomly, because the refractive index of the firstliquid crystal molecules 112 is different Anisotropic, so that the refractive index of the droplet does not match the refractive index of thefirst polymer matrix 111, and thefirst PDLC layer 110 is in a scattering state; at the same time, due to the presence of thedichroic dye 113, when the first PDLC layer When 110 is in the scattering state, the first PDLC display displays color. Therefore, thefirst PDLC layer 110 has remarkable optoelectronic properties, and can exhibit two different optical states of the transmission state and the scattering state; compared with the traditional twisted liquid crystal display, the advantage of the PDLC display made with thefirst PDLC layer 110 is that it does not A polarizer and an alignment layer are required, the preparation process is simple, and it is easy to manufacture the first flexible and large-area PDLC display.

优选地，在上述调色器中，第一透明电极层200和第二透明电极层220分别置于第一TFT阵列基板100和第二TFT阵列基板300上，如此可减小双面显示装置的厚度。Preferably, in the above toner, the firsttransparent electrode layer 200 and the secondtransparent electrode layer 220 are respectively placed on the firstTFT array substrate 100 and the secondTFT array substrate 300, so that the double-sided display device can be reduced. thickness.

优选地，继续参见图1、图2，调色层210包括：第二聚合物基体211，位于第二聚合物基体211中的第二液晶分子212和黑色染料213；其中，第二液晶分子212为向列相液晶、近晶相液晶或胆甾相液晶；黑色染料213在调色层210处于散射态时显示黑色。更具体地说，第二液晶分子212和黑色染料213以微滴的形态均匀的分散在第二聚合物基体211中，第二聚合物基体211为微滴提供了稳定的网络结构。当对调色器施加驱动电压时，即在第一透明电极层200和第二透明电极层220之间形成电场，第二液晶分子212和黑色染料213在电场作用下有规则排列，微滴的折射率与第二聚合物基体211的折射率相匹配，此时调色层210呈透明态，当未对调色器施加驱动电压时，第二液晶分子212和黑色染料213无规则排列，因第二液晶分子212的折射率是各向异性的，使微滴的折射率与第二聚合物基体211的折射率不匹配，此时调色层210呈散射态；同时因黑色染料的存在，当调色层210处于散射态时显示黑色。因此，调色器具有显著的光电特性，可在透明态和黑色态两种光学状态下切换。Preferably, referring to Fig. 1 and Fig. 2, thetoning layer 210 includes: a second polymer matrix 211, a secondliquid crystal molecule 212 and ablack dye 213 located in the second polymer matrix 211; wherein, the secondliquid crystal molecule 212 It is a nematic liquid crystal, a smectic liquid crystal or a cholesteric liquid crystal; theblack dye 213 shows black when thecoloring layer 210 is in a scattering state. More specifically, the secondliquid crystal molecules 212 and theblack dye 213 are uniformly dispersed in the second polymer matrix 211 in the form of droplets, and the second polymer matrix 211 provides a stable network structure for the droplets. When a driving voltage is applied to the toner, that is, an electric field is formed between the firsttransparent electrode layer 200 and the secondtransparent electrode layer 220, the secondliquid crystal molecules 212 and theblack dye 213 are arranged regularly under the action of the electric field, and the droplet The refractive index matches the refractive index of the second polymer matrix 211. At this time, thetoning layer 210 is in a transparent state. When no driving voltage is applied to the toner, the secondliquid crystal molecules 212 and theblack dye 213 are arranged randomly, so The refractive index of the secondliquid crystal molecule 212 is anisotropic, so that the refractive index of the droplet does not match the refractive index of the second polymer matrix 211. At this time, thetoning layer 210 is in a scattering state; at the same time, due to the presence of the black dye, When thetoning layer 210 is in a scattering state, it displays black. As a result, the toner has remarkable optoelectronic properties and can be switched between two optical states, transparent and black.

优选地，双面显示装置进一步还包括：分别与两个PDLC显示器和调色器连接的三个驱动电路，也就是说，第一PDLC显示器、第二PDLC显示器以及调色器各自连接一个驱动电路，通过这三个驱动电路单独控制第一PDLC显示器、第二PDLC显示器的工作状态，使双面显示装置中的两个PDLC显示器显示显示相同或不同内容；例如，需要在第一PDLC显示器和第二PDLC显示器显示相同的内容时，对第一PDLC显示器和第二PDLC显示器发送相同的驱动信号即可，驱动电路的具体结构为本领域技术人员所熟知，在这里就不详细描述了。当对调色器施加驱动电压时，调色器呈透明态，此时分别对第一PDLC显示器、第二PDLC显示器施加驱动电压，可实现双面显示装置的透明显示功能；当不施加驱动电压给调色器时，调色器呈黑色态，此时分别对第一PDLC显示器、第二PDLC显示器施加驱动电压，可实现双面显示装置的单面或双面显示功能。Preferably, the double-sided display device further includes: three drive circuits respectively connected to the two PDLC displays and the toner, that is to say, each of the first PDLC display, the second PDLC display, and the toner is connected to a drive circuit , separately controlling the working states of the first PDLC display and the second PDLC display through these three driving circuits, so that the two PDLC displays in the double-sided display device display the same or different content; When the two PDLC displays display the same content, it is sufficient to send the same driving signal to the first PDLC display and the second PDLC display. The specific structure of the driving circuit is well known to those skilled in the art and will not be described in detail here. When the driving voltage is applied to the toner, the toner is in a transparent state. At this time, the driving voltage is applied to the first PDLC display and the second PDLC display respectively, so that the transparent display function of the double-sided display device can be realized; when the driving voltage is not applied When the toner is supplied to the toner, the toner is in a black state. At this time, driving voltages are respectively applied to the first PDLC display and the second PDLC display to realize the single-sided or double-sided display function of the double-sided display device.

下面通过对双面显示装置显示原理的描述，来进一步的说明本实施例中的双面装置。The following describes the display principle of the double-sided display device to further illustrate the double-sided device in this embodiment.

继续参见图2，当分别对第一PDLC显示器、第二PDLC显示器和调色器施加驱动电压时，第一PDLC显示器、第二PDLC显示器中的第一液晶分子112和二向色性染料在各自所处的电场作用下有规则排列，此时第一PDLC显示器、第二PDLC显示器呈透明态；而调色器中的第二液晶分子212和黑色染料213在电场作用下有规则排列，此时调色器呈透明态；也就是说，同时对第一PDLC显示器、第二PDLC显示器和调色器施加驱动电压时，双面显示装置实现透明显示功能。Continuing to refer to FIG. 2, when driving voltages are respectively applied to the first PDLC display, the second PDLC display and the toner, the firstliquid crystal molecules 112 and the dichroic dyes in the first PDLC display and the second PDLC display are respectively There is a regular arrangement under the action of the electric field where the first PDLC display and the second PDLC display are in a transparent state; while the secondliquid crystal molecules 212 and theblack dye 213 in the toner are regularly arranged under the action of the electric field, at this time The toner is in a transparent state; that is, when a driving voltage is applied to the first PDLC display, the second PDLC display and the toner at the same time, the double-sided display device realizes a transparent display function.

继续参见图1，当对调色器不施加驱动电压时，即调色器处于断电状态时，调色器中的第二液晶分子212和黑色染料213无规则排列，光射到调色器上时产生散射，同时因黑色染料的存在，此时调色器呈黑色态。而当调色器处于黑色态时，调色器可以作为第一PDLC显示器和第二PDLC显示器的基底，在第一PDLC显示器和第二PDLC显示器显示画面时，可增加对比度。分别对第一PDLC显示器和第二PDLC显示器施加驱动电压，因第一PDLC显示器和第二PDLC显示器都采用TFT阵列基板，TFT作为电压控制开关，控制每一个像素区的电压写入和保持；在每一个PDLC显示器中，每一个像素区对应的第一液晶分子112在电场作用下有规则排列，呈透明态；在无电场作用时无规则排列，同时因二向色性染料的存在，呈彩色散射态；因此，第一PDLC显示器或第二PDLC显示器在进行图像显示时，需对显示图像的像素区不施加驱动电压，对不显示图像区的像素区施加驱动电压，至于如何对第一PDLC显示器或第二PDLC显示器的像素区施加或不施加驱动电压，为本领域技术人员所熟知，这里就不详细描述了。Continuing to refer to Fig. 1, when the driving voltage is not applied to the toner, that is, when the toner is in a power-off state, the secondliquid crystal molecules 212 and theblack dye 213 in the toner are arranged randomly, and the light hits the toner Scattering occurs when it is on, and at the same time due to the presence of black dye, the toner is in a black state at this time. When the toner is in a black state, the toner can be used as the base of the first PDLC display and the second PDLC display, and the contrast can be increased when the first PDLC display and the second PDLC display display images. Apply driving voltages to the first PDLC display and the second PDLC display respectively, because both the first PDLC display and the second PDLC display use a TFT array substrate, and the TFT is used as a voltage control switch to control the voltage writing and holding of each pixel area; In each PDLC display, the firstliquid crystal molecules 112 corresponding to each pixel area are arranged regularly under the action of an electric field, showing a transparent state; when there is no action of an electric field, they are arranged randomly, and at the same time due to the existence of dichroic dyes, they are colored Scattering state; therefore, when the first PDLC display or the second PDLC display is displaying an image, it is necessary not to apply a driving voltage to the pixel area displaying the image, and to apply a driving voltage to the pixel area not displaying the image area. As for how to apply the driving voltage to the pixel area of the first PDLC Applying or not applying a driving voltage to the pixel area of the display or the second PDLC display is well known to those skilled in the art, and will not be described in detail here.

综上所述，本实施例提供的双面显示装置，调色器具有两种光学状态：透明态和黑色态；当调色器断电时，此时调色器呈黑色态，可作为两个PDLC显示器的基底，用以增加每个PDLC显示器的对比度；每一个PDLC显示器在各自对应的驱动电路控制之下，可实现画面显示，也就是说，双面显示装置在调色器断电的条件下，通过各自的驱动电路控制两个PDLC显示器，实现单面或双面显示；当调色器通电时，调色器呈透明态，每一个PDLC显示器在对应驱动电路的控制之下，可实现透明显示，也就是说，双面显示装置在调色器通电的条件下，通过各自的驱动电路控制两个PDLC显示器，可实现透明功能。To sum up, in the double-sided display device provided by this embodiment, the toner has two optical states: a transparent state and a black state; when the toner is powered off, the toner is in a black state and can be used as two The substrate of each PDLC display is used to increase the contrast ratio of each PDLC display; each PDLC display can realize picture display under the control of its corresponding driving circuit, that is to say, the double-sided display device is powered off when the toner is turned off. Under certain conditions, the two PDLC displays are controlled by their respective drive circuits to achieve single-sided or double-sided display; when the toner is powered on, the toner is in a transparent state, and each PDLC display can be displayed under the control of the corresponding drive circuit. To achieve transparent display, that is to say, the double-sided display device can realize the transparent function by controlling the two PDLC displays through their respective driving circuits under the condition that the toner is powered on.

显然，本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (8)

1. A dual-sided display device, comprising:

two Polymer Dispersed Liquid Crystal (PDLC) displays arranged oppositely; wherein each of the PDLC displays comprises: the liquid crystal display comprises a Thin Film Transistor (TFT) array substrate with a pixel electrode, a common electrode substrate opposite to the TFT array substrate, and a PDLC layer which is positioned between the TFT array substrate and the common electrode substrate and can switch between a transparent state and a scattering state;

the color mixer is positioned between the two TFT array substrates; wherein the color mixer comprises: the two transparent electrode layers are opposite in position, and the color adjusting layer capable of switching between a transparent state and a black state is arranged between the two transparent electrode layers.

2. The dual sided display device of claim 1, wherein the PDLC layer comprises: a first polymer matrix, first liquid crystal molecules and a dichroic dye located in the first polymer matrix.

3. The dual-sided display device of claim 2, wherein the first liquid crystal molecules are nematic liquid crystals or smectic liquid crystals.

4. The dual sided display device of claim 2, wherein the PDLC layer displays color when in a scattering state.

5. The dual-sided display device of claim 1, wherein the two transparent electrode layers are disposed on the two TFT array substrates, respectively.

6. The dual sided display device of claim 5, wherein the color modulation layer comprises: a second polymer matrix, second liquid crystal molecules and a black dye located in the second polymer matrix.

7. The dual-sided display device of claim 6, wherein the second liquid crystal molecules are nematic, smectic, or cholesteric liquid crystals.

8. The dual sided display device of any of claims 1-7, further comprising: and the three driving circuits are respectively connected with the two PDLC displays and the color mixer.

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