Embodiment
As shown in Figure 1, smectic-state liquid crystal display of the present invention comprises display layer 100, be provided with backsheet layer 300 at the back side of this display layer 100, between this display layer 100 and this backsheet layer 300, be provided with lustre adding layer 200, this lustre adding layer 200 comprises substrate 210, and this substrate 210 is provided with illustrious component towards the surface of this display layer 100 and/or this backsheet layer 300.
This display layer 100 comprises that the material of first base layer 101 and second base layer, 102, the first base layers 101 and second base layer 102 is chosen as glass or plastics.As Fig. 2, be provided with the mixolimnion 103 that forms by smectic phase liquid crystal and additives mixed between this first base layer 101 and this second base layer 102, this smectic phase liquid crystal is category-A smectic phase liquid crystal (Smectic-A) organic compound, as with silica-based compound, four cyano four octyl group biphenyl, tetraacethyl ester in last of the ten Heavenly stems four cyano biphenyl etc.Additive is the compound of band conductive characteristic, contains the compound of conductive ion as cetyltriethylammonium bromide etc.This first base layer 101 is provided with first conductive electrode layer 104 towards a side of this mixolimnion 103, and this second base layer 102 is provided with second conductive electrode layer 105 towards a side of this mixolimnion 103.First conductive electrode layer 104, second conductive electrode layer 105 are connected with driving control device.First conductive electrode layer 104 can be made up of M strip shaped electric poles that is arranged in parallel, second conductive electrode layer 105 can be made up of N strip shaped electric poles that is arranged in parallel, N strip shaped electric poles of the M of first conductive electrode layer 104 strip shaped electric poles and second conductive electrode layer 105 is perpendicular, form the pixel-matrix array structure of a M * N, form M * N pixel.These two conductive electrode layers 104 and 105 and middle mixolimnion 103 formed a capacitance structure that area is very big.First conductive electrode layer 104 and second conductive electrode layer 105 are transparent, and it can be ITO (tin indium oxide) etc., and can use auxiliary metal electrode as required, as aluminium, copper, silver etc.It is smectic liquid crystal display screen in 200710304409.2 the Chinese invention patent " driving circuit for smectic state LCD display " that this display layer 100 is the patent No., also be number of patent application and be the electric-controlled light-regulating medium in 200710175959.9 the Chinese invention patent application " a kind of electric-controlled light-regulating medium ", so the structure etc. that display layer is described on ground more is described in detail in detail no longer here.
This backsheet layer 300 can be made by PET or PC or plastics or paper-like materials, and this backsheet layer 300 can be black, white or other colors.
This lustre adding layer 200 is transparent, and light transmission is fine.This substrate 210 is made by the PET material, and this illustrious component can be add lustre to film (not shown) or prism structure 220.The film that adds lustre to is one deck high refractive index resins film, and refractive index is between 1.65 to 1.8.This prism structure 220 is made by the resin of high index of refraction, and refractive index is controlled between 1.65 to 1.8.During actual fabrication, can cut the high refractive index resins film and obtain prism structure.
In reality is implemented, this substrate 210 on the surface of this display layer 100, the prism structure 220 that is provided with towards the surface of backsheet layer 300 of this substrate 210 can be and be convexly equipped with or be arranged with, and the prism structure 220 that the prism structure 220 that this substrate 210 is provided with towards the surface of this display layer 100 and this substrate 210 are provided with towards the surface of backsheet layer 300 can be identical or different.
As Fig. 4, except at this substrate 210 towards being provided with illustrious component on the surface of this display layer 100 or this backsheet layer 300 and on the surface of this display layer 100, this backsheet layer 300, all being provided with the illustrious component at this substrate 210, also can towards the surperficial epirelief of this first base layer 101 of this lustre adding layer 200 if be concaved with illustrious component (Fig. 4 shows the situation that illustrious component is a kind of form in the prism structure), this illustrious component can be add lustre to film or prism structure 220 equally.The illustrious component that the illustrious component that the surface of this first base layer 101 is provided with and this substrate 210 are provided with towards the surface of this display layer 100 and this backsheet layer 300 can be identical or different.In reality was implemented, display of the present invention was not provided with lustre adding layer 200, and only was fine on the surface of first base layer 101 of backsheet layer 300 illustrious component being set yet.
Below prism structure 220 is done detailed description.
This prism structure 220 can be made up of a plurality of stripe prisms, the xsect of this stripe prisms can be triangle, square, rectangle, semicircle, quadrant shape, fan-shaped, trapezoidal, binary Fresnel shape or parabola shaped in any, the xsect of this stripe prisms also can be arbitrary shape.In the reality, this prism structure 220 can tile and be paved with whole base plate 210, also can only be laid on a certain position on the substrate 210.This prism structure 220 can be neatly regularly arranged, but also irregular alignment.The structure of each stripe prisms in this prism structure 220 can be identical, also can be inequality or incomplete same.
For example:
As Fig. 3 A, the prism structure 220 that substrate 210 is convexly equipped with on the surface of this display layer 100 is that leg-of-mutton stripe prisms 221 is formed by a plurality of xsects, these a plurality of stripe prisms 221 are neatly regularly arranged, and one three arm of angle of stripe prisms 221 is connected with substrate 210.
As Fig. 3 B, the prism structure 220 that substrate 210 is convexly equipped with on the surface of this display layer 100 is that leg-of-mutton stripe prisms 221 is formed by a plurality of xsects, these a plurality of stripe prisms 221 are neatly regularly arranged, one three arm of angle of stripe prisms 221 is connected with substrate 210, the prism structure 220 that substrate 210 is convexly equipped with on the surface of this backsheet layer 300 is that semicircular stripe prisms 222 is formed by a plurality of xsects, these a plurality of stripe prisms 222 are neatly regularly arranged, and the straight flange of stripe prisms 222 is connected with substrate 210.
As Fig. 3 C, the prism structure 220 that substrate 210 is convexly equipped with on the surface of this display layer 100 is that (this binary Fresnel shape is made of two straight flanges and an arc limit binary Fresnel shape by a plurality of xsects, as Fig. 3 C) stripe prisms 223 form, these a plurality of stripe prisms 223 are neatly regularly arranged, and a straight flange of stripe prisms 223 is connected with substrate 210.
As Fig. 3 D, substrate 210 is concaved with a plurality of half-terete grooves on the surface of display layer 100, and being embedded a corresponding xsect in each this groove is semicircular stripe prisms 224.These a plurality of stripe prisms 224 just constitute prism structure 220.
As Fig. 3 G, the prism structure 220 shown in the figure is that parabolical stripe prisms 231 is formed by a plurality of xsects, the varying in size of these stripe prisms 231, and these stripe prisms 231 irregular alignments are on this substrate 210.
As Fig. 3 H, the prism structure 220 shown in the figure is entirely a kind of erose prism structure.
Certainly, prism structure 220 also can be made up of the prism of wide variety of shapes except being made up of stripe prisms.For example, this prism structure 220 can be made up of a plurality of pyramid shapes or spherical shape prism.This prism structure 220 also can be made up of stacked optical grating construction (prior art does not describe in detail).
In addition, prism structure 220 can be made up of a plurality of stripe prisms composite structures, this stripe prisms composite structure is made of at least two long prisms of strip, and the xsect of these at least two long prisms of strip is identical or different, and the refractive index of these at least two long prisms of strip is different.And, can be provided with the grid hurdle structure that is used to stop side direction light between two adjacent stripe prisms composite structures, with reflection or the refraction efficient that increases light.
For example, as Fig. 3 F, the stripe prisms composite structure is made of two long prisms of strip, the xsect of a long prism 228 of strip is semicircle, the long prism 229 of another strip is suitable rectangular structure of this stripe prisms composite structure formation that makes of shape of the long prism 228 of semicircular strip with this xsect, as figure, the refractive index of the long prism 228,229 of these two strips is inequality, is provided with the grid hurdle structure 230 that is used to stop side direction light between two adjacent stripe prisms composite structures.
In addition, this prism structure 220 can be made up of a plurality of stripe prisms and a plurality of stripe prisms composite structure, these a plurality of stripe prisms are arranged with on the surface of substrate 210, on these a plurality of stripe prisms, convex with this a plurality of stripe prisms composite structures, this stripe prisms composite structure is made of at least two long prisms of strip, the xsect of these at least two long prisms of strip is identical or different, and the refractive index of these at least two long prisms of strip is different.
For example, as Fig. 3 E, substrate 210 is concaved with a plurality of half-terete grooves on the surface of display layer 100, being embedded a corresponding xsect in each this groove is semicircular stripe prisms 225, the stripe prisms 225 that is embedded in each groove is provided with one and is rectangular-shaped stripe prisms composite structure, the long prism 226 of strip and 227 that this stripe prisms composite structure is a right-angle triangle by two xsects is fitted by hypotenuse and is formed, and the refractive index of the long prism 226,227 of strip that these two xsects are right-angle triangle is inequality.These a plurality of stripe prisms 225, the long prism 226,227 of strip just constitute prism structure 220.
In addition,, also can on this surface, be coated with transparent ink, to increase light transmission if when substrate 210 is not provided with prism structure on the surface of backsheet layer 300.
As Fig. 1, also can be provided with protective seam 400 in the front of this display layer 100, protective seam 400 is made by PET or PC or glass baseplate, this protective seam coating or stick on this second base layer 102.This protective seam 400 can be provided with the anti-reflective AR film and/or the AG film of anti-dazzle on the surface of display layer 100, with protection display layer 100, improve the comfort of reading, watching.Preferably, this protective seam 400 can plate earlier on the surface of display layer 100 and establish the AR film, and then the AG film is established in plating.Certainly, also AR film and/or the plating of AG film can be located on the surface of second base layer 102.
Can be doped with the particle that is used to increase protective seam hardness, prevents protective seam generation direct reflection effect in the protective seam 400, this particle can be microsphere particles or ink molecules material.This microsphere particles is the nanoscale or the micron utmost point, can be metal or other organic plastics class microsphere particles.
The particle that also can mix in second base layer 102 produces the direct reflection effect to prevent display.In addition, also can carry out roughness to second base layer 102 and handle, for example atomizing processing, etching processing etc. to reduce the direct reflection on second base layer, 102 surfaces, improve the comfort of reading, watching.
Be example with lustre adding layer below, principle of work of the present invention be described with prism structure 220:
As Fig. 1, drive control device controls is applied to the voltage signal on two conductive electrode layers 104 and 105, make each pixel in the display layer 100 according to showing needs corresponding vaporific attitude of frosted or the bright state of full impregnated of presenting.If black backsheet layer 300 is set, corresponding black or the white (the bright state of the corresponding full impregnated of black, the vaporific attitude of white corresponding frosted) of showing as of pixel then, LCD is also with regard to the corresponding white and black displays state that is rendered as.
Particularly, according to showing needs, control the voltage signal on each strip shaped electric poles in each conductive electrode layer, the smectic phase liquid crystal molecule of each pixel correspondence in the display layer 100 presents corresponding ordered state---out of order ordered state or regularly arranged state.
With a pixel is the example explanation:
If this pixel is according to showing needs; be subjected to the voltage signal (100v for example on its corresponding strip shaped electric poles; driving pulse about 1kHz) control; its corresponding smectic phase liquid crystal molecule becomes regularly arranged; the long optical axis of smectic phase liquid crystal molecule is perpendicular to first; the plane of second conductive electrode layer; then the incident ray of injecting from the outside is via protective seam 400; display layer 100 parts of this pixel correspondence; lustre adding layer 200 and directive backsheet layer 300; via the reflection of backsheet layer 300 and pass through lustre adding layer 200 successively; display layer 100 parts of this pixel correspondence and protective seam 400 and directly penetrate; the ray refraction of each smectic phase liquid crystal molecule of incident does not produce acute variation; this pixel presents the bright state of full impregnated, the backsheet layer 300 of corresponding black and show black.
If this pixel is according to showing needs; be subjected to the control of the voltage signal (for example driving pulse about 100v, 50Hz) on its corresponding strip shaped electric poles; its corresponding smectic phase liquid crystal molecule twists; become out of order arrangement; then the incident ray of injecting from the outside enters in display layer 100 parts of this pixel correspondence via protective seam 400; in display layer 100 parts of this pixel correspondence, light reflects the back and penetrates in the smectic phase liquid crystal molecule, inject lustre adding layer 200.The light of injecting lustre adding layer 200 may be via lustre adding layer 200 back directive backsheet layers 300, also may be reflected back toward display layer 100 parts of this pixel correspondence and reflect once more.And, behind the light directive lustre adding layer 200 of backsheet layer 300 with reflected back, because lustre adding layer 200 designs have prism structure 220, the light of penetrating back from backsheet layer 300 may be reflected directive backsheet layer 300 once more by lustre adding layer 200, display layer 100 parts that also may inject this pixel correspondence via lustre adding layer 200 change directions once more reflect, and the like.The light that reflects in display layer 100 parts of this pixel correspondence produces dispersion effect, is penetrated by protective seam 400 at last.Particularly, in display layer 100 parts of this pixel correspondence, because each of smectic phase liquid crystal molecule (promptly passed through the long optical axis difference of each liquid crystal to diversity owing to incident ray, the anaclasis angle difference of each liquid crystal, thereby the refractive index difference of each liquid crystal), make the ray refraction of each smectic phase liquid crystal molecule of incident exist very big difference, promptly in display layer 100 parts of this pixel correspondence, optical index is producing violent variation, strong scattering has taken place in light in display layer 100 parts of this pixel correspondence, on macroscopic view, be a kind of astigmatic effect, present vaporific shading state, as acute-matte.This shows, lustre adding layer 200 among the present invention can increase the interior number of times of display layer 100 parts that light is injected this pixel correspondence, increase the interior amount of light of display layer 100 parts of this pixel correspondence, more rays is reflected in display layer 100 parts of this pixel correspondence, thereby strengthen the dispersion effect of display layer 100 parts of this pixel correspondence, the brightness of the vaporific attitude of frosted that this pixel presents is improved.Compare the backsheet layer 300 of the corresponding black of this pixel and shown the very high white of brightness with other black pixel points outside this pixel.Compare with existing smectic liquid crystal display screen, the contrast between the black that demonstrates on this white and the display is obviously strengthened.
It should be noted that, here no longer describe in detail about the light modulation principle in the display layer 100 (be smectic phase liquid crystal molecule how to be driven accordingly arrange), see also the patent No. and be 200710304409.2 Chinese invention patent " driving circuit for smectic state LCD display ", number of patent application and be 200710175959.9 Chinese invention patent application " a kind of electric-controlled light-regulating medium " and number of patent application and be the corresponding light modulation principles illustrated in 200810102000.7 the Chinese invention patent application " electric-controlled light-regulating medium ".
After producing luminous effects such as scattering, full impregnated be bright for first, second conductive electrode layer load driver pulse, the present invention, just can remove voltage.The maintenance of this luminous effect does not need voltage to keep, promptly remove voltage after, the luminous effect that the present invention produces in the time of still can keeping on-load voltage, and the voltage signal of effect is just in order to change the arrangement form of smectic phase liquid crystal molecule.In the present invention, this state that does not need electricity to drive and keep luminous effect is called " multistable " or " quasistatic ".And this " multistable " is because additive has adopted the compound of band conductive characteristic, when electric signal is applied on first, second conductive electrode layer, ion in the compound of band conductive characteristic changes the generation to-and-fro movement according to electric potential difference, this motion can change the arrangement form of smectic phase liquid crystal molecule, and the smectic phase Liquid Crystal Molecules Alignment form after changing does not need the persistent movement of ion to keep, and is stable.
Certainly, the pulse that is applied to the driving pulse on first, second conductive electrode layer by reasonable control is to number, frequency, voltage magnitude or action time, can make the arrangement form of smectic phase liquid crystal molecule become the part distortion, to produce astigmatic effect in various degree, thereby on macroscopic view, make pixel of the present invention between two states of the bright state of vaporific attitude of frosted and full impregnated, produce multiple progressive state, as translucent etc. with different gray scales rank.
In addition, in mixolimnion 103, also can be mixed with a certain amount of dichroic dye,, here not describe in detail as flaxen azo group dichroic dye.
Advantage of the present invention is:
The illustrious component of the lustre adding layer design among the present invention can carry out repeatedly reflected refraction with the light of injecting display, increase light number of times and the quantity injected in the display layer, more rays in being shown as the display layer part of pixel correspondence of the vaporific attitude of frosted, needs is reflected, thereby enhancing dispersion effect, the pixel of the vaporific attitude of frosted is strengthened because of the reinforcement brightness of dispersion effect, thereby the contrast between the pixel of the pixel of the vaporific attitude of frosted and the bright state of full impregnated significantly improves, strengthen the display effect of display of the present invention, increased reading, the comfort of watching.Simultaneously, because the illustrious component of lustre adding layer designs, increased the visible angle of smectic-state liquid crystal display of the present invention.If design has illustrious component on first base layer, then it also can produce the effect of above-mentioned enhancing contrast ratio equally.
The design of AR film and/or AG film makes the protective seam among the present invention play and prevents that display surface from producing the effect of direct reflection, thereby beholder's eyesight has been protected in display surface does not produce reflective, dazzle.The design of particle makes the protective seam among the present invention to the light on the directive display surface certain scattering process be arranged; make protective seam have to prevent display surface from producing the effect that direct reflection, display surface do not produce reflective and dazzle, heavy seal coat hardness, protected the surface of display well.
Reflection appears display to the color that backsheet layer among the present invention has itself through ambient light, also can increase the contrast between vaporific attitude of pixel frosted and the bright state of full impregnated, strengthens reading, the viewing effect of display of the present invention.
Certainly, because display design of the present invention has the display layer that is made of smectic phase liquid crystal and additive, thereby, it also has many advantages of bringing because of display layer, for example, multistable characteristic, energy consumption are low, environmental protection etc., here no longer describe in detail, and the associated advantages that sees also number of patent application and be 200710175959.9 Chinese invention patent application " a kind of electric-controlled light-regulating medium " and number of patent application and be in 200810102000.7 the Chinese invention patent application " electric-controlled light-regulating medium " is described.
The above is the know-why of preferred embodiment of the present invention and utilization thereof; for a person skilled in the art; under the situation that does not deviate from the spirit and scope of the present invention; any based on conspicuous changes such as the equivalent transformation on the technical solution of the present invention basis, simple replacements, all belong within the protection domain of the present invention.