CN105390066A - Display device - Google Patents

Abstract

The invention provides a display device. The display device comprises a display screen, a liquid lens array, a view field conversion controller and a liquid array lens driver, wherein the liquid lens array is based on the electrowetting principle and is formed by arrangement of multiple single lenses, and the liquid lens array is arranged on the surface of the display screen and parallel to the display screen; the view field conversion controller is used for setting the control modes which include the parallel view field mode, the narrow view field mode, the wide view field mode and the rotary view field mode, and the liquid array lens driver applies voltage to the single lenses of the liquid lens array according to the set control modes so as to change the focal length of each single lens to achieve view field conversion. According to the display device, conversion between the parallel view field, the narrow view field, the wide view field and the rotary view field can be achieved quickly, so that the display device has multiple functions.

Description

Display device

Technical field

The present invention relates to display technique, and in particular to carrying out the display device of visual field conversion.

Background technology

Along with the development of display technique, the requirement of people to display function is more and more diversified, is such as the narrow visual field protecting individual privacy sometimes, sometimes the desirably wide visual field that can share of many people again, and this just requires that display screen can be changed between different visual field.

The method that prior art solves this problem mainly contains two kinds:

(1) realize narrow visual angle by the field angle adjustment film mode be attached on picture and protect individual privacy;

(2) drive electrode is divided into two kinds of electrodes, one is wide viewing angle display driver electrode, and another kind of for controlling visual angle electrode, can produce suitable light leak, reach the effect of wide viewing angle and narrow view angle switch when it applies appropriate drive voltage.

But when pasting film, field angle is limited in narrow visual angle all the time, can not switching at runtime width visual angle; And method drive electrode being divided into two kinds of electrodes can make integral finish rate reduce, brightness declines.

Summary of the invention

The object of the invention is to, a kind of display device is provided, to solve the above-mentioned technical matters caused by the limitation of prior art and shortcoming.

The invention provides a kind of display device, comprise display screen, liquid lens array, visual field switching controller and liquid array lens actuator; Described liquid lens array is based on electric electro-wetting principle and formed by multiple monomer lens arrangement, and described liquid lens array is arranged at described display screen surface and placement parallel with described display screen; Described visual field switching controller is used for arranging control model, and described control model comprises: parallel visual field pattern, narrow visual field pattern, wide visual field pattern and rotation visual field pattern; Described liquid array lens actuator applies voltage respectively according to each monomer lens of control model to described liquid lens array arranged, and realizes visual field conversion with the focal length changing each monomer lens.

Further, described display device also comprises the position sensor being arranged at described display screen, the user that described visual field switching controller obtains according to position sensor and the viewing distance of display screen and the switching of viewing angle determination control model.

Further, the arrangement mode of described multiple monomer lens can be that square matrix or parity rows stagger isosceles triangle shape matrix or in cellular matrix.

Further, described monomer lens comprise first substrate, the second substrate relative with first substrate, be located at the electrode on first substrate and be arranged at two mesh sheet metals between first substrate and second substrate symmetrically, the surrounding of mesh sheet metal and the lower surface of second substrate are equipped with hydrophobic layer, two mesh sheet metals and first substrate and second substrate are formed with accommodating cavity, be equipped with conduction liquid layer in described accommodating cavity and be positioned at above described conduction liquid layer with described conduction liquid layer unmixing and the identical nonpolar insulation liquid layer of density, form one between described conduction liquid layer with described nonpolar insulation liquid layer and contact liquid level, described electrode is connected with described liquid array lens actuator, described liquid array lens actuator to described electrode application voltage to change the shape of described contact liquid level.

Further, described first substrate is glass or transparent resin material, described electrode is tin indium oxide, zinc paste or aluminium oxide, described conduction liquid layer is solion layer, described hydrophobic layer is amorphous fluoropolymer or transparent fluororesin, described nonpolar insulation liquid layer is mineral oil layer, and described second substrate is glass plate.

Further, described accommodating cavity is column type or circular platform type.

Further, under narrow visual field pattern or wide visual field pattern, obtain the voltage putting on each monomer lens in such a way:

Formula 2 is met for its focal distance f of the zooming liquid lens be made up of two kinds of liquid and voltage U:

$f=\frac{1}{\frac{n_2-n_1}{r}\left({\mathrm{cos\θ}}_0+\frac{{\mathrm{\ϵ}}_0{\mathrm{\ϵ}}_r}{2{\mathrm{d\γ}}_{12}}{U}^2\right)}---\left(2\right)$

In formula: d is insulative dielectric layer thickness; ε _rfor hydrophobic layer medium relative dielectric constant; n ₁, n ₂be respectively the refractive index of two kinds of liquid; γ ₁₂it is the interfacial tension between two kinds of liquid; θ ₀for the contact angle of liquid and dielectric layer; R is lens opening;

If the eyes of user are L from the distance of display screen, user wants the m reducing picture or be enlarged into former visual field, m<1 under the pattern of narrow visual field, under wide visual field pattern, and m>1;

Image in A ' point for the some A on display screen through liquid lens array, make the coordinate of A point for (x, y, 0), then the coordinate that A ' puts is (mx, my, z), then the distance of AA ' is:

$\left|{\mathrm{AA}}^{\&prime;}\right|=\sqrt{{(mx-x)}^2+{(my-y)}^2+z^2}---\left(3\right)$

Therefore image distance s '=| AA ' |, make the distance of liquid lens array and display screen be b, namely object distance s is b, by imaging formula:

$\frac{1}{s^{\&prime;}}+\frac{1}{s}=\frac{1}{f}---\left(4\right)$

Object distance, image distance are brought into (4) Shi Ke get:

$\frac{1}{\left|{\mathrm{AA}}^{\&prime;}\right|}+\frac{1}{b}=\frac{1}{f}---\left(5\right)$

By (3) formula, (5) formula of bringing into obtains again:

$f=\frac{b\sqrt{{(mx-x)}^2+{(my-y)}^2+z^2}}{b+\sqrt{{(mx-x)}^2+{(my-y)}^2+z^2}}---\left(6\right)$

Associating (2) formula and (6) formula just can calculate voltage U A point being imaged in the required applying of monomer lens that A ' puts:

$U=\sqrt{\left(\frac{r}{\left(\frac{b\sqrt{{(mx-x)}^2+{(my-y)}^2+z^2}}{b+\sqrt{{(mx-x)}^2+{(my-y)}^2+z^2}}\right)(n_2-n_1)}-{\mathrm{cos\&theta;}}_0\right)\frac{2{\mathrm{d\&gamma;}}_{12}}{{\mathrm{\&epsiv;}}_0{\mathrm{\&epsiv;}}_r}}---\left(7\right).$

Further, the voltage obtaining in such a way under the pattern of visual field and put on each monomer lens is being rotated:

When observer moves to W ' by position W, it have rotated β relative to OW ' relative to OW angle, and display screen equivalence should rotate to A ' by A, and the display point C on A images in C ' point through liquid lens array, supposes that C point coordinate is (x, y ₀), then image distance s ': s '=xsin β (8)

If the distance of liquid lens array and display screen is b, namely object distance s is b, can be obtained by imaging formula (4):

$\frac{1}{x\sin \mathrm{\&beta;}}+\frac{1}{b}=\frac{1}{f}---\left(9\right)$

$f=\frac{bxsin\mathrm{\&beta;}}{b+xsin\mathrm{\&beta;}}---\left(10\right)$

Associating (10) and formula (2) just can calculate and C point be imaged in C ' when putting, the voltage U of the required applying of monomer lens:

$U=\sqrt{\left(\frac{r}{\left(\frac{bxsin\mathrm{\&beta;}}{b+xsin\mathrm{\&beta;}}\right)(n_2-n_1)}-{\mathrm{cos\&theta;}}_0\right)\frac{2{\mathrm{d\&gamma;}}_{12}}{{\mathrm{\&epsiv;}}_0{\mathrm{\&epsiv;}}_r}}---\left(11\right).$

The invention has the beneficial effects as follows:

(1) conversion of parallel visual field, narrow visual field, wide visual field and rotation visual field can be realized fast, make the functional diversities of display.

(2) liquid lens can continuous vari-focus, can focus, make picture undistorted, and operate quick and convenient to each lens.

(3) be widely used, not only can be applied to display screen, can apply in the field such as vehicle-mounted, industry control, electric torch.

(4) liquid lens power consumption is low, and power consumption is little.

Accompanying drawing explanation

Fig. 1 is the ultimate principle figure of electrowetting effect.

Fig. 2 is the structural drawing of the display device of the embodiment of the present invention.

Fig. 3 is the vertical view of the display device of the embodiment of the present invention.

Fig. 4 is the side view of the display device of the embodiment of the present invention.

Fig. 5 is the structural section figure of the monomer lens of the embodiment of the present invention.

Fig. 6 a-Fig. 6 c is the focal length variations figure of the monomer lens of the embodiment of the present invention.

Fig. 7 is the design sketch that the display device of the embodiment of the present invention is in parallel visual field pattern.

Fig. 8 is the design sketch that the display device of the embodiment of the present invention is in narrow visual field pattern.

Fig. 9 is the schematic diagram of imaging change under the pattern of narrow visual field.

Figure 10 is the design sketch that the display device of the embodiment of the present invention is in wide visual field pattern.

Figure 11 is that the display device of the embodiment of the present invention is in the design sketch rotating visual field pattern.

Figure 12 be rotate coordinate under visual field pattern set up schematic diagram.

Figure 13 is the schematic diagram of imaging change under the field mode of rotation visual field.

Embodiment

For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is further described.

The ultimate principle of electrowetting effect between solid (electrode) and electrolyte, applies potential difference (PD) and the solid-electrolyte contact angle caused changes, and its principle schematic as shown in Figure 1.

As shown in Figure 1: A is metallic substrates; B is hydrophobic insulating medium layer; U is power supply, and p is the metal electrode inserting conducting liquid inside; θ ₀the contact angle of conducting liquid and insulating medium layer B during for not applying voltage; θ _ufor the contact angle of conducting liquid and insulating medium layer B after applying voltage U.

When not applying voltage to liquid, conducting liquid presents state of nature 10 under the effect of its own face tension force, and in conducting liquid, charged ion is uniformly distributed, and now the contact angle of conducting liquid and insulating medium layer B is θ ₀.When by power supply being liquid applying voltage U, metallic substrates A and insulating medium layer B surface of contact start to accumulate negative charge, the surface of contact of corresponding conducting liquid and insulating medium layer B starts to accumulate positive charge, under the electrostatic forcing that positive and negative charge attracts each other, the face of conducting liquid and insulating medium layer B expands gradually, finally become form 20, now contact angle becomes θ _u.

Wherein, contact angle and the relation applied between voltage meet poplar-Lippmann (Yong-Lippmann) equation:

$cos\left({\mathrm{\&theta;}}_U\right)=cos\left({\mathrm{\&theta;}}_0\right)+\frac{{\mathrm{\&epsiv;}}_0{\mathrm{\&epsiv;}}_d}{2{\mathrm{\&gamma;}}_{lv}d}{U}^2---\left(1\right)$

In formula: ε ₀for the absolute dielectric constant in vacuum; D is the thickness of insulating medium layer B; ε _dfor the absolute dielectric constant in vacuum; γ _lvfor the interfacial tension between solid phase-liquid phase; U is impressed voltage.

For specific conducting liquid, from formula (1), contact angle can be regulated by given voltage U.

The present invention carries out drived control to the liquid lens based on above-mentioned electrowetting effect, to realize the conversion of display visual field.

Please participate in Fig. 2-Fig. 4, the embodiment of the present invention provides a kind of display device, comprises display screen 21, liquid lens array 22, visual field switching controller 23 and liquid array lens actuator 24.Wherein, liquid lens array 22 arranges based on electric electro-wetting principle and by multiple monomer lens 26 and forms, and liquid lens array 22 is arranged at display screen 21 surface, described liquid lens array 22 and the parallel placement of described display screen 21.It should be noted that, the arrangement mode of multiple monomer lens 26 can be that square matrix or parity rows stagger isosceles triangle shape matrix or in cellular matrix.Visual field switching controller 23 is for arranging control model, and described control model comprises parallel visual field pattern, narrow visual field pattern, wide visual field pattern and rotates visual field pattern.Liquid array lens actuator 24, for applying voltage respectively according to each monomer lens 26 of control model to described liquid lens array 22 arranged, realizes visual field conversion with the focal length changing each monomer lens 26.

In the present embodiment, display device also comprises the position sensor 210 (see Fig. 7-Figure 11) being arranged at described display screen 21, and described visual field switching controller 23 is for according to the viewing distance of user and display screen and the switching of viewing angle determination control model.Like this, described visual field switching controller 23 is for the setting of control model, and can be that user manually carries out selection switching, also can be that the result detected according to position sensor 210 controls automatically, this be described in detail in follow-up embodiment.

Monomer lens of the present invention are made based on above-mentioned electric electro-wetting principle, and the structural section figure of monomer lens 26 as shown in Figure 5.Described monomer lens 26 comprise first substrate 1 second substrate relative with first substrate 16, are located at the electrode 2 on first substrate 1 and are arranged at two mesh sheet metals 7 between first substrate 1 and second substrate 6 symmetrically.The surrounding of mesh sheet metal 7 and the lower surface of second substrate 6 are equipped with hydrophobic layer 4.Two mesh sheet metals 7 are formed with accommodating cavity with first substrate 1 and second substrate 6.Be equipped with conduction liquid layer 3 in described accommodating cavity and be positioned at above described conduction liquid layer 3 with described conduction liquid layer 3 unmixing and the identical nonpolar insulation liquid layer 5 of density.Form one between described conduction liquid layer 3 with described nonpolar insulation liquid layer 5 and contact liquid level 8, described electrode 2 is connected with described liquid array lens actuator 24, and described liquid array lens actuator 24 applies voltage to change the shape of described contact liquid level 8 to described electrode 2.It should be noted that, in the present embodiment, described cavity is column type, can certainly select other shapes, such as truncated conical shape etc.

Described first substrate 1 is glass or transparent resin material, described electrode 2 is tin indium oxide, zinc paste or aluminium oxide, described conduction liquid layer 3 is solion layer, described hydrophobic layer 4 is amorphous fluoropolymer or transparent fluororesin, described nonpolar insulation liquid layer 5 is mineral oil layer, and described second substrate 6 is glass plate.

When not applying voltage to monomer lens 26, due to conduct electricity surface tension that the surface tension of liquid layer 3 is greater than nonpolar insulation liquid layer 5 therefore now the contact liquid level 8 of the inner two kinds of liquid of liquid lens present the meniscus as shown in Fig. 6 (a), when the refractive index of conduction liquid layer 3 is greater than the refractive index of nonpolar insulation liquid layer 5, monomer lens equivalent is now plano-convex lens.

When applying voltage to gradually monomer lens 26, from electric electro-wetting principle, electrode 2 in and in conduction liquid layer 3 electric charge electrostatic force effect under, the angle conducted electricity between liquid layer 3 and hydrophobic layer 4 increases gradually, and causes and lead interface curvature and increase gradually.When voltage increases to particular value, contact liquid level 8 become surface level as shown in Fig. 6 (b), now liquid lens to light without deviation effect light along former direction scioptics.

When continuing to increase voltage, contact liquid level 8 becomes concave face as shown in Fig. 6 (c) from surface level, is equivalent to concave mirror.

Formula 2 is met for its focal distance f of the zooming liquid lens be made up of two kinds of liquid and voltage U:

$f=\frac{1}{\frac{n_2-n_1}{r}\left({\mathrm{cos\&theta;}}_0+\frac{{\mathrm{\&epsiv;}}_0{\mathrm{\&epsiv;}}_r}{2{\mathrm{d\&gamma;}}_{12}}{U}^2\right)}---\left(2\right)$

In formula: d is insulative dielectric layer thickness; ε _rfor hydrophobic layer medium relative dielectric constant; n ₁, n ₂be respectively the refractive index of two kinds of liquid; γ ₁₂it is the interfacial tension between two kinds of liquid; θ ₀for the contact angle of liquid and dielectric layer; R is lens opening.

Therefore, after each parameter optimization is determined, the applying voltage that only need control monomer lens 26 just can obtain the particular focal length of required monomer lens 26.

Below to the parallel visual field pattern of display device of the present invention, narrow visual field pattern, wide visual field pattern, and the concrete control method rotating visual field pattern is described.

(1) parallel visual field pattern

For parallel visual field pattern, now each monomer lens 26 of liquid lens array 22 are in Fig. 6 (b) state, display frame is unchanged transmission after lens, now, without restriction to the visual angle of display, identical with visual field during no liquid lens arra, now liquid lens is equivalent to a flat glass.

The design sketch of parallel visual field pattern is as Fig. 7, when user selects parallel visual field order, liquid array lens actuator 24 pairs of liquid lens arrays 22 apply suitable voltage and focus, the parallel light display screen injection sent to make backlight, namely display frame is identical with display screen size, to reach the effect of parallel visual field.

(2) narrow visual field pattern

For narrow visual field pattern, the mass action of liquid lens array 22 is equivalent to convex lens, and the m (m<1) display screen picture being contracted to original picture doubly, realizes the focusing of image like this.

When selecting narrow visual field pattern, as Fig. 8 (in figure, cylinder length represents the size of liquid lens focal length f), liquid array lens actuator 24 adjusts the voltage swing of each monomer lens 26, the focal length of liquid lens array 22 is focused, the light on display both sides is gathered to centre, now liquid lens array 22 effect is equal to convex lens, not exclusively equivalent convex lens again, because modulate focal length to reach picture scaled down and undistorted, only drawing the schematic diagram of focal length in figure, is not the shape of liquid lens.Suppose that the eyes of user are L from the distance of display screen, user wants m (m<1) times that picture is reduced into former visual field.

Refer to Fig. 9, set up coordinate system as shown in the figure, suppose that narrow visual field is m times of original visual field, then image in A ' point for the some A on display screen through liquid lens array 22, the coordinate making A point is (x, y, 0) coordinate that, then A ' puts is (mx, my, z), then the distance of AA ' is:

$\left|{\mathrm{AA}}^{\&prime;}\right|=\sqrt{{(mx-x)}^2+{(my-y)}^2+z^2}---\left(1\right)$

Therefore image distance s '=| AA ' |, make liquid lens array 22 be b with the distance of display screen 21, namely object distance s is b, by imaging formula:

$\frac{1}{s^{\&prime;}}+\frac{1}{s}=\frac{1}{f}---\left(4\right)$

Object distance, image distance are brought into (4) Shi Ke get:

$\frac{1}{\left|{\mathrm{AA}}^{\&prime;}\right|}+\frac{1}{b}=\frac{1}{f}---\left(5\right)$

By (3) formula, (5) formula of bringing into obtains again:

$f=\frac{b\sqrt{{(mx-x)}^2+{(my-y)}^2+z^2}}{b+\sqrt{{(mx-x)}^2+{(my-y)}^2+z^2}}---\left(6\right)$

Associating (2) formula and (6) formula just can calculate voltage U A point being imaged in the required applying of monomer lens that A ' puts:

$U=\sqrt{\left(\frac{r}{\left(\frac{b\sqrt{{(mx-x)}^2+{(my-y)}^2+z^2}}{b+\sqrt{{(mx-x)}^2+{(my-y)}^2+z^2}}\right)(n_2-n_1)}-{\mathrm{cos\&theta;}}_0\right)\frac{2{\mathrm{d\&gamma;}}_{12}}{{\mathrm{\&epsiv;}}_0{\mathrm{\&epsiv;}}_r}}---\left(7\right)$

(3) wide visual field pattern

With narrow visual field pattern in like manner, when wide visual field pattern, as shown in Figure 10, liquid lens effect is equal to concavees lens, and light is dispersed to surrounding, and the people around display also can share picture.

From formula (7), it has the general situation being also applicable to wide visual field, just now the effect of all liquid crystal lens arrays is equivalent to concavees lens, imaging viewing field is enlarged into the m (m>1) of original display screen picture doubly.

(4) visual field pattern is rotated

Rotating visual field pattern refers to when user is when near display screen marginal position, this pattern can be opened, the position of human eye is located by position sensor 210, liquid lens array 22 is according to the position of human eye, the position that each monomer lens 26 carry out focusing to make the central authorities of display screen 21 rotate to human eye to be faced, effect as shown in figure 11.

Refer to Figure 12 and Figure 13, coordinate system is as shown in the figure set up to display screen under rotation visual field, for rotating visual field, it is equivalent to that display screen is overall to rotate a certain angle β (being recorded by the position of position sensor 210 person according to the observation) around y-axis, and therefore on display screen, arbitrary B with same x coordinate figure body lens 26 of itemizing have identical imaging focal length.Capable its imaging focal length of liquid lens array 22 of A with identical y value is determined by its x value.

Therefore only analyze with A behavior example.

When observer moves to W ' by position W, it have rotated β relative to OW ' relative to OW angle, therefore do not tilt to feel for making observer watch display screen 21, display screen equivalence should rotate to A ' by A, and the display point C therefore on A images in C ' point through liquid lens array 22.Suppose that C point coordinate is (x, y ₀), then image distance s ':

s′＝xsinβ(8)

Suppose that liquid lens array 22 is b with the distance of display screen 21, namely object distance s is b, can be obtained by imaging formula (4):

$\frac{1}{x\sin \mathrm{\&beta;}}+\frac{1}{b}=\frac{1}{f}---\left(9\right)$

$f=\frac{bxsin\mathrm{\&beta;}}{b+xsin\mathrm{\&beta;}}---\left(10\right)$

Associating (10) and (2) just can calculate and C point be imaged in C ' when putting, the voltage U of the required applying of monomer lens 26:

$U=\sqrt{\left(\frac{r}{\left(\frac{bxsin\mathrm{\&beta;}}{b+xsin\mathrm{\&beta;}}\right)(n_2-n_1)}-{\mathrm{cos\&theta;}}_0\right)\frac{2{\mathrm{d\&gamma;}}_{12}}{{\mathrm{\&epsiv;}}_0{\mathrm{\&epsiv;}}_r}}---\left(11\right)$

Have formula (11) known it to possess generality, for user to anticlockwise still to right rotation, it all uses, and respective regions lens are convex or for concavees lens to have x value to determine.

Switching for parallel visual field pattern, narrow visual field pattern, wide visual field pattern and rotation visual field pattern can be manually carry out, one options is such as provided, select for user, be convenient to the control of user for visual field pattern like this, adopting narrow visual field pattern when privacy, adopting wide visual field pattern when sharing.The switching of visual field pattern also can be that the result detected according to position sensor 210 switches automatically, such as, detect the edge that user is positioned at display screen 21, then starting and rotate visual field pattern, for being positioned at the dead ahead of display screen 21, then adopting parallel visual field pattern.

The present invention has following beneficial effect:

(1) conversion of parallel visual field, narrow visual field, wide visual field and rotation visual field can be realized fast, make the functional diversities of display.

(2) liquid lens can continuous vari-focus, can focus, make picture undistorted, and operate quick and convenient to each lens.

(3) be widely used, not only can be applied to display screen, can apply in the field such as vehicle-mounted, industry control, electric torch.

(4) liquid lens power consumption is low, and power consumption is little.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (8)

1. a display device, is characterized in that, comprises display screen (21), liquid lens array (22), visual field switching controller (23) and liquid array lens actuator (24); Described liquid lens array (22) is based on electric electro-wetting principle and formed by the arrangement of multiple monomer lens (26), described liquid lens array (22) be arranged at described display screen (21) surface and with described display screen (21) parallel placement; Described visual field switching controller (23) is for arranging control model, and described control model comprises: parallel visual field pattern, narrow visual field pattern, wide visual field pattern and rotation visual field pattern; Described liquid array lens actuator (24) applies voltage respectively according to each monomer lens (26) of control model to described liquid lens array (22) arranged, and realizes visual field conversion with the focal length changing each monomer lens (26).

2. display device as claimed in claim 1, it is characterized in that, described display device also comprises the position sensor (210) being arranged at described display screen (21), the user that described visual field switching controller (23) obtains according to position sensor (210) and the viewing distance of display screen (21) and the switching of viewing angle determination control model.

3. display device as claimed in claim 1, is characterized in that, the arrangement mode of described multiple monomer lens (26) can be that square matrix or parity rows stagger isosceles triangle shape matrix or in cellular matrix.

4. display device as claimed in claim 1, it is characterized in that, described monomer lens (26) comprise first substrate (1), the second substrate (6) relative with first substrate (1), be located at the electrode (2) on first substrate (1) and be arranged at two mesh sheet metals (7) between first substrate (1) and second substrate (6) symmetrically, the lower surface of mesh sheet metal (7) surrounding and second substrate (6) is equipped with hydrophobic layer (4), two mesh sheet metals (7) are formed with accommodating cavity with first substrate (1) and second substrate (6), be equipped with conduction liquid layer (3) in described accommodating cavity and be positioned at described conduction liquid layer (3) top with described conduction liquid layer (3) unmixing and the identical nonpolar insulation liquid layer (5) of density, form one between described conduction liquid layer (3) with described nonpolar insulation liquid layer (5) and contact liquid level (4), described electrode (2) is connected with described liquid array lens actuator (24), described liquid array lens actuator (24) applies voltage to change the shape of described contact liquid level (4) to described electrode (2).

5. display device as claimed in claim 4, it is characterized in that, described first substrate (1) is glass or transparent resin material, described electrode (2) is tin indium oxide, zinc paste or aluminium oxide, described conduction liquid layer (3) is solion layer, described hydrophobic layer (4) is amorphous fluoropolymer or transparent fluororesin, and described nonpolar insulation liquid layer (5) is mineral oil layer, and described second substrate (6) is glass plate.

6. display device as claimed in claim 1, it is characterized in that, described accommodating cavity is column type or truncated conical shape.

7. display device as claimed in claim 1, is characterized in that, obtains the voltage putting on each monomer lens (26) under narrow visual field pattern or wide visual field pattern in such a way:

Formula 2 is met for its focal distance f of the zooming liquid lens be made up of two kinds of liquid and voltage U:

$f=\frac{1}{\frac{n_2-n_1}{r}({\mathrm{cos\&theta;}}_0+\frac{{\mathrm{\&epsiv;}}_0{\mathrm{\&epsiv;}}_r}{2{\mathrm{d\&gamma;}}_{12}}{U}^2)}---\left(2\right)$

In formula: d is insulative dielectric layer thickness; ε _rfor hydrophobic layer medium relative dielectric constant; N1, n2 are respectively the refractive index of two kinds of liquid; γ ₁₂it is the interfacial tension between two kinds of liquid; θ ₀the contact angle of liquid and dielectric layer; R lens opening;

If the eyes of user are L from the distance of display screen (21), user wants the m reducing picture or be enlarged into former visual field, m<1 under the pattern of narrow visual field, under wide visual field pattern, and m>1;

Image in A ' point for the some A on display screen (21) through liquid lens array (22), make the coordinate of A point for (x, y, 0), then the coordinate that A ' puts is (mx, my, z), then the distance of AA ' is:

$\left|{\mathrm{AA}}^{\&prime;}\right|=\sqrt{{(mx-x)}^2+{(my-y)}^2+z^2}---\left(3\right)$

Therefore image distance s '=| AA ' |, make liquid lens array (22) be b with the distance of display screen (21), namely object distance s is b, by imaging formula:

$\frac{1}{s^{\&prime;}}+\frac{1}{s}=\frac{1}{f}---\left(4\right)$

Object distance, image distance are brought into (4) Shi Ke get:

$\frac{1}{\left|{\mathrm{AA}}^{\&prime;}\right|}+\frac{1}{b}=\frac{1}{f}---\left(5\right)$

By (3) formula, (5) formula of bringing into obtains again:

$f=\frac{b\sqrt{{(mx-x)}^2+{(my-y)}^2+z^2}}{b+\sqrt{{(mx-x)}^2+{(my-y)}^2+z^2}}---\left(6\right)$

Associating (2) formula and (6) formula just can calculate voltage U A point being imaged in the required applying of monomer lens (26) that A ' puts:

$U=\sqrt{(\frac{r}{\left(\frac{b\sqrt{{(mx-x)}^2+{(my-y)}^2+z^2}}{b+\sqrt{{(mx-x)}^2+{(my-y)}^2+z^2}}\right)(n_2-n_1)}-{\mathrm{cos\&theta;}}_0)\frac{2{\mathrm{d\&gamma;}}_{12}}{{\mathrm{\&epsiv;}}_0{\mathrm{\&epsiv;}}_r}}---\left(7\right).$

8. display device as claimed in claim 7, is characterized in that, is rotating the voltage obtaining in such a way under the pattern of visual field and put on each monomer lens (26):

When observer moves to W ' by position W, it have rotated β relative to OW ' relative to OW angle, and display screen (21) equivalence should rotate to A ' by A, and the display point C on A images in C ' point through liquid lens array (22), suppose that C point coordinate is (x, y ₀), then image distance s ': s '=xsin β (8)

If liquid lens array (22) is b with the distance of display screen (21), namely object distance s is b, can be obtained by imaging formula (4):

$\frac{1}{xsin\mathrm{\&beta;}}+\frac{1}{b}=\frac{1}{f}---\left(9\right)$

$f=\frac{bxsin\mathrm{\&beta;}}{b+xsin\mathrm{\&beta;}}---\left(10\right)$

Associating (10) and formula (2) just can calculate and C point be imaged in C ' when putting, the voltage U of the required applying of monomer lens (26):

$U=\sqrt{(\frac{r}{\left(\frac{bx\sin \mathrm{\&beta;}}{b+x\sin \mathrm{\&beta;}}\right)(n_2-n_1)}-{\mathrm{cos\&theta;}}_0)\frac{2{\mathrm{d\&gamma;}}_{12}}{{\mathrm{\&epsiv;}}_0{\mathrm{\&epsiv;}}_r}}---\left(11\right).$