CN201788333U

CN201788333U - Bistable LCD

Info

Publication number: CN201788333U
Application number: CN2010202864462U
Authority: CN
Inventors: 潘翼辉
Original assignee: DONGGUAN TONGHUA LCD Co Ltd
Current assignee: DONGGUAN TONGHUA LCD Co Ltd
Priority date: 2010-08-09
Filing date: 2010-08-09
Publication date: 2011-04-06
Anticipated expiration: 2020-08-09

Abstract

The utility model relates to the technical field of LCDs, particularly discloses a bistable LCD. The bistable LCD comprises an upper glass substrate and a lower glass substrate which are parallel to each other and disposed correspondingly, wherein sealant is arranged at the periphery of the part between the upper glass substrate and the lower glass substrate; the upper glass substrate, the lower glass substrate and the sealant are sealed to form a closed inner chamber; cholesteric liquid crystal is filled in the closed inner chamber; and an absorbing layer is printed on the outer surface of the lower glass substrate. By adopting the bistable LCD provided by the utility model, display can be realized without a polaroid and backlight, the power consumption is low because images can be kept for a long period of time when electric field is unavailable, favorable indoor and outdoor readability, large viewing angle and different colorful display are realized, and the display capacity is higher in comparison with a common LCD.

Description

Bistable liquid crystal display

Technical field:

The utility model relates to technical field of liquid crystal display, relates in particular to bistable liquid crystal display.

Background technology:

In the prior art, common LCD generally comprises by two-layer transparent glass substrate and is enclosed in liquid crystal layer between the layer glass substrate and liquid crystal cell that electrode etc. constitutes, all posts one deck polaroid at two outside surfaces of liquid crystal cell.Its displaying principle is, natural light is filtered into linearly polarized photon after through a polaroid, because the distortion pitch of liquid crystal molecule in box is much bigger more than visible wavelength, so after the linearly polarized photon incident of or quadrature consistent with the Liquid Crystal Molecules Alignment direction, its polarization direction is twisting 90 ° through meeting behind the whole liquid crystal layer, penetrated by opposite side then, orthogonal polarizers plays the effect of printing opacity; If on liquid crystal cell, apply the voltage of certain value, the liquid crystal major axis begins to tilt along direction of an electric field, after voltage reaches about twice threshold voltage, except that the liquid crystal molecule of electrode surface, liquid crystal molecule in all liquid crystal cells between two electrodes all becomes the arrangement again along direction of an electric field, at this moment the defunctionalization of 90 ° of optically-actives has lost the optically-active effect between orthogonal polarizers, makes the device can not printing opacity.If use parallel polaroid then opposite.Utilize way to make light change its saturating and hide state just, thereby realize showing to liquid crystal cell energising or outage.

Common LCD such as common ultra-twist liquid crystal display screen (STN-LCD) just must constantly refresh picture when needing only the LCD display pattern, and supply of electrical energy just can not show in case cut off the power supply constantly, and great majority need collocation use backlight; In addition, upper and lower glass substrate outside all needs to paste the higher polaroid of one deck cost, and display effect can be subjected to the restriction of viewing angle, and the capacity of display is limited.

The utility model content:

The purpose of this utility model is at the deficiencies in the prior art, and a kind of bistable liquid crystal display is provided, and it can show long-term and stably still that under the situation of outage and low in energy consumption, the visual angle is big, and the capacity of display is higher.

For achieving the above object, the utility model is by the following technical solutions:

Bistable liquid crystal display, it comprises and being parallel to each other and the top glass substrate and the lower glass substrate of corresponding configuration, be provided with fluid sealant around between top glass substrate and the lower glass substrate, described top glass substrate, lower glass substrate and fluid sealant sealing form airtight inner chamber, be filled with cholesteric liquid crystal in the airtight inner chamber, the outside surface of described lower glass substrate is printed with absorption layer.

The inside surface that described top glass substrate and lower glass substrate are positioned at airtight inner chamber one side is equipped with electrode.

The surface printing of described electrode has one deck and the contacted alignment film of cholesteric liquid crystal.

Also be filled with some sarks in the described airtight inner chamber.

Described absorption layer is an ink lay.

The utility model beneficial effect is:

Bistable liquid crystal display described in the utility model, it comprises and being parallel to each other and the top glass substrate and the lower glass substrate of corresponding configuration, be provided with fluid sealant around between top glass substrate and the lower glass substrate, described top glass substrate, lower glass substrate and fluid sealant sealing form airtight inner chamber, be filled with cholesteric liquid crystal in the airtight inner chamber, the outside surface of described lower glass substrate is printed with absorption layer.Adopt the bistable liquid crystal display of said structure, its display mode does not need polaroid and backlight, image can keep under the situation of electric field for a long time not having, low in energy consumption, indoor and outdoor good readability arranged, the visual angle is big, can realize that different colors shows than common liquid crystals display screen the higher capacity of display is arranged.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fundamental diagram when Fig. 2 is bright attitude for the utility model;

Fundamental diagram when Fig. 3 is dark attitude for the utility model.

Embodiment:

Below in conjunction with accompanying drawing the utility model is further described.

As shown in Figure 1, bistable liquid crystal display, it comprises and being parallel to each other and the top glass substrate 1 and the lower glass substrate 2 of corresponding configuration, be provided with fluid sealant 3 around between top glass substrate 1 and the lower glass substrate 2, described top glass substrate 1, lower glass substrate 2 and fluid sealant 3 sealings form airtight inner chamber, are filled with cholesteric liquid crystal 5 in the airtight inner chamber.The outside surface of described lower glass substrate 2 is printed with absorption layer 8, and the color of absorption layer 8 is a black, and as preferred embodiment, described absorption layer 8 is an ink lay; The inside surface that described top glass substrate 1 and lower glass substrate 2 are positioned at airtight inner chamber one side is equipped with electrode 4; The surface printing of described electrode 4 has one deck and cholesteric liquid crystal 5 contacted alignment films 6, and this alignment film 6 is without polishing; Also be filled with some sarks 7 that are used to support appropriate space in the described airtight inner chamber.

Above-mentioned bistable liquid crystal display, its principle of work is, because the spiral layers structure of cholesteric liquid crystal 5 inside, it can reflect the light of wavelength in the certain limit, the width of general reflection wavelength is at 50～90nm, its catoptrical wavelength depends primarily on the double refractive inde and the pitch of cholesteric liquid crystal 5, foveal reflex wavelength X 0=1/2*P*n/ /+n ⊥, the range delta lambda of reflection wavelength=P* Δ n.At the back side of LCD is the absorption layer 8 of outside surface printing one deck black of lower glass substrate 2, and the light transmission LCD absorbed layer 8 that is not reflected absorbs.At this moment, people can see is near the very strong reflected light of certain color λ 0 wavelength, is referred to as bright attitude (planar state), the fundamental diagram when being illustrated in figure 2 as bright attitude.When cholesteric liquid crystal 5 is state at random fully, because the liquid crystal layer that cholesteric liquid crystal 5 forms is very thin, can not form enough strong selection reflection this moment, outside the scattering of depolarization fraction, most of light then all is black through LCD is absorbed by the absorption layer 8 of black, be referred to as dark attitude (focal conic state), the fundamental diagram when being illustrated in figure 3 as dark attitude.During bistable state showed, cholesteric liquid crystal 5 can have three kinds of ordered states in box, and wherein above-mentioned bright attitude and dark attitude are not having can to stablize long-time existence under the situation of electric field.

In sum, bistable liquid crystal display described in the utility model, its display mode does not need polaroid and backlight, image can keep under the situation of electric field for a long time not having, low in energy consumption, indoor and outdoor good readability arranged, the visual angle is big, can realize that different colors shows than common liquid crystals display screen the higher capacity of display is arranged.

The above only is a better embodiment of the present utility model, so all equivalences of doing according to the described structure of the utility model patent claim, feature and principle change or modify, is included in the utility model patent claim.

Claims

1. bistable liquid crystal display, it comprises and being parallel to each other and the top glass substrate (1) and the lower glass substrate (2) of corresponding configuration, it is characterized in that: be provided with fluid sealant (3) around between top glass substrate (1) and the lower glass substrate (2), described top glass substrate (1), lower glass substrate (2) and fluid sealant (3) sealing form airtight inner chamber, be filled with cholesteric liquid crystal (5) in the airtight inner chamber, the outside surface of described lower glass substrate (2) is printed with absorption layer (8).

2. bistable liquid crystal display according to claim 1 is characterized in that: the inside surface that described top glass substrate (1) and lower glass substrate (2) are positioned at airtight inner chamber one side is equipped with electrode (4).

3. bistable liquid crystal display according to claim 2 is characterized in that: the surface printing of described electrode (4) has one deck and the contacted alignment film of cholesteric liquid crystal (5) (6).

4. bistable liquid crystal display according to claim 3 is characterized in that: also be filled with some sarks (7) in the described airtight inner chamber.

5. bistable liquid crystal display according to claim 4 is characterized in that: described absorption layer (8) is an ink lay.