CN101246262A - 2D/3D switchable stereo display device - Google Patents

Abstract

The invention discloses a 2D/3D switchable three dimensional display device, which not only includes display panel and 2D/3D switchable device, but also includes a polymer dispersed liquid crystal PDLC device with adjustable scattered rate, which is equipped between the display panel and the 2D/3D switchable device. The PDLC device is used to cause the emergent light of display panel to scatter or directly transmit to the 2D/3D switchable device. In the 2D/3D switchable three dimensional display device provided by the invention, because the PDLC device could cause the emergent light of display panel to scatter, the Moire fringe produced by mutualinterference between the display panel and the 2D/3D switchable device can be eliminated.

Description

A kind of 2D/3D switchable stereo display device

Technical field

The present invention relates to the stereo display field, relate in particular to a kind of 2D/3D switchable stereo display device.

Background technology

Along with the development of display technique, the 2D/3D switchable stereo display device becomes a new research direction in stereo display field.With respect to the 3 d display device that only has single three-dimensional display function, the 2D/3D switchable stereo display device can make the user freely select to adopt two dimensional mode or 3-D display pattern to watch, therefore, this kind display device has bigger practical value.

Figure 1 shows that the brief configuration synoptic diagram of existing 2D/3D switchable stereo display device, this device mainly comprisesdisplay panel 11 and 2D/3D switching device shifter 12.Wherein, the emergent light of the display panel in the comparatively common 2D/3D switchable stereo display device is a linearly polarized light, display panel 11 can be that emergent light is LCD (the Liquid crystal display of linearly polarized light as described, LCD), or emergent light is the display of non-property linearly polarized light and the optical combination device such as combination that place this display display plane polarizer before, for example described display panel 11 is cathode-ray tube (CrystalRay Tube, CRT) display and combination that places the display plane polarizer before of CRT monitor.The optical devices of described 2D/3Dswitching device shifter 12 for having 2D mode of operation and 3D mode of operation, after the emergent light of display panel 11 is incident to 2D/3Dswitching device shifter 12, if this 2D/3Dswitching device shifter 12 is in the 2D mode of operation, then direct transmitted light, make the beholder see two dimensional image, and when 2D/3Dswitching device shifter 12 is in the 3D mode of operation, 2D/3Dswitching device shifter 12 changes the optical characteristics of incident light, and provide left-eye image and the eye image with parallax respectively to beholder's left eye and right eye, so the beholder can see stereo-picture.

Existing a kind of 2D/3D switching device shifter mainly comprises polarized light conversion device and lens subassembly two large divisions, for example disclosed device among the CN101114055.Polarized light conversion device mainly is provided with the substrate of alignment film by two surfaces and the twisted liquid crystal that is full of therebetween constitutes, and the twisted liquid crystal box of main flow has thin film transistor (TFT) (Thin Film Transistor, TFT) matrix structure at present.Because the 2D/3D switchable stereo display device has been technique known in detail, therefore the principle of work of this kind device is described in detail no longer herein.Obviously, when the 2D/3D switchable stereo display device was worked, the TFT matrix structure in the polarized light conversion device can be interfered mutually with the two-dimentional pixel plane architecture of display panel and be produced Moire fringe; Perhaps, the two-dimensional grid structure of some lens arras in the lens subassembly also can be interfered the generation Moire fringe mutually with the two-dimentional pixel plane architecture of display panel.Moire fringe can influence the display quality of the picture necktie of grid (as have) of the fine and smooth rule that three-dimensional display shows, make for example to occur black and white or rainbow striped or the like disturbing factor on the picture, thereby fuzzy original picture makes the beholder do not feel like oneself.

For solving the influence of Moire fringe to 3 d display device, a kind of method that diffusion sheet is set between display panel and 2D/3D switching device shifter is provided in the prior art, because the diffusion sheet that is provided with can spread the emergent ray of the two-dimentional pixel plane of display panel, thereby can alleviate the Moire fringe that to interfere generation mutually between the structure of the two-dimentional pixel plane architecture of display panel and polarized light conversion device in the 2D/3D switching device shifter or lens subassembly.When the 2D/3D switchable stereo display device is in the 3-D display pattern, because the 2D/3D switching device shifter is in the some distance of the sub-pixel of the new pixel that is become on the imaging surface on the two-dimentional pixel plane that is greater than former display panel, therefore under the 3-D display pattern, the space image effect that the method that above-mentioned interpolation diffusion sheet is eliminated Moire fringe can obviously not influence this stereoscopic device and become.But, when the 2D/3D switchable stereo display device is in two dimensional mode, the light that each sub-pixel on the two-dimentional pixel plane of display panel sends is spread by the diffusion sheet on its exit direction, therefore, the light that the parton pixel is sent can not fully, clearly be transmitted through people's eyes by the 2D/3D switching device shifter, it is fuzzy to cause this 2D/3D switchable stereo display device to show.In addition, if the pixel on the two-dimentional pixel plane of display panel is apart from more little, the light that each pixel is sent can enter eyes after the diffusion sheet scattering light is just few more, therefore along with the raising of the resolution of display panel, be used to alleviate Moire fringe and the diffusion sheet that is provided with is just serious more to the influence of the two-dimentional display effect of this kind 3 d display device.

As seen, above-mentioned interpolation scattered power fixing diffusion sheet is to be cost with the two-dimentional display resolution of sacrificing this device with the scheme that alleviates the Moire fringe that may generate in the 2D/3D switchable stereo display device.Therefore, the dynamic diffusion sheet that needs a kind of scattering degree to regulate as required eliminating the Moire fringe in the 2D/3D switchable stereo display device, and does not influence the display effect of this device.

Summary of the invention

The object of the present invention is to provide a kind of 2D/3D switchable stereo display device that does not have obvious moir, this apparatus structure is simple, flexible operation.

A kind of 2D/3D switchable stereo display device provided by the invention, comprise display panel and 2D/3D switching device shifter, the light of described display panel outgoing is linearly polarized light, in addition, this 2D/3D switchable stereo display device also comprises: be arranged between described display panel and the described 2D/3D switching device shifter, the adjustable condensate dispersal type of scattered power liquid crystal PDLC device, this PDLC device is used for the emergent light scattering of described display panel or directly is transmitted through described 2D/3D switching device shifter.

Another kind of 2D/3D switchable stereo display device provided by the invention, comprise display panel and 2D/3D switching device shifter, the light of described display panel outgoing is nonlinear polarization light, in addition, this 2D/3D switchable stereo display device also comprises the adjustable condensate dispersal type of the scattered power liquid crystal PDLC device and the polarizer; The described polarizer is between described display panel and described 2D/3D switching device shifter, described PDLC device is between the described display panel and the described polarizer or between the described polarizer and described 2D/3D switching device shifter, and described PDLC device is used for the light scattering of incident or directly transmission.

When the light of described display panel outgoing is the nonlinear polarization light time, described display panel is a kind of in LCD, cathode-ray tube display, Plasmia indicating panel, organic light emitting diode display, the Field Emission Display.

Described PDLC device comprises: the PDLC material reaches the device that variable electric field is provided for this PDLC material.

Described 2D/3D switching device shifter comprises: polarized light conversion device and lens subassembly;

Described polarized light conversion device, be used for being incident to described lens subassembly after the direct transmission of first linearly polarized light with incident, perhaps, first linearly polarized light of incident is rotated into second linearly polarized light vertical with this polarized light polarization direction, and second linearly polarized light is incided described lens subassembly; Described first linearly polarized light shows as first trend during by described lens subassembly, and described second linearly polarized light shows as with described first during by described lens subassembly and moves towards the second different trends.

Above-mentioned polarized light conversion device comprise can be automatically controlled twisted liquid crystal.

Above-mentioned polarized light conversion device has thin-film transistor structure.

In the 2D/3D switchable stereo display device provided by the invention, described 2D/3D switching device shifter also can comprise: by single refraction rate lens and the lens subassembly can automatically controlled refraction of birefringence lens formed.

Describedly can automatically controlled refraction of birefringence lens comprise liquid crystal material.

In the such scheme provided by the invention, between display panel and 2D/3D switching device shifter, be provided with the adjustable PDLC material of scattered power, therefore, this PDLC material can carry out the part scattering to the emergent light on the two-dimensional pixel plane of described display panel, thereby eliminates in the described 2D/3D switchable stereo display device because the Moire fringe of interfering generation between the structure of the two-dimensional pixel planar structure of display panel and twisted liquid crystal in the 2D/3D switching device shifter or lens arra.With respect to prior art, the 2D/3D switchable stereo display device of the PDLC material eliminates Moire fringe that above-mentioned employing can be automatically controlled has the following advantages:

1, because PDLC material easy accessibility makes that the structure of 2D/3D switchable stereo display device is more simple, flexible operation, easy to maintenance;

2, the nephelometric turbidity unit of PDLC material can be regulated, so the PDLC material that is provided with can with respect to prior art, can not reduce and the obvious Moire fringe of eliminating the two dimensional image generation considerable influence of 2D/3D switchable stereo display device demonstration.

Description of drawings

Fig. 1 is the brief configuration synoptic diagram of existing a kind of 2D/3D switchable stereo display device;

Fig. 2 is the optical axis structural representation of the liquid crystal droplet among a kind of PDLC;

Fig. 3 A is the structural representation that does not have the PDLC box of extra electric field;

Fig. 3 B is the structural representation that has applied the PDLC box of extra electric field;

A kind of 2D/3D switchable stereo display device that Fig. 4 provides for the embodiment of the invention;

The detailed structure synoptic diagram of a kind of 2D/3D switchable stereo display device that Fig. 5 provides for the embodiment of the invention 1;

Fig. 6 A is a 2D/3D switchable stereo display device shown in Figure 5 index path when being in two dimensional mode;

Fig. 6 B is 2D/3D switchable stereo display device shown in Figure 5 wherein a kind of state index path when being in the 3-D display pattern;

The detailed structure synoptic diagram of a kind of 2D/3D switchable stereo display device that Fig. 7 provides for the embodiment of the invention 2.

Embodiment

As everyone knows, after liquid crystal droplet and polymer mixed, be clipped between the polyester plastics film of the two-layer ITO of being coated with, just constitute condensate dispersal type liquid crystal (Polymer dispersed liquid crystal, PDLC) box, because the PDLC box has automatically controlled scattering properties, so the present invention adopts automatically controlled PDLC box to eliminate issuable Moire fringe in the 2D/3D switchable stereo display device.

Ultimate principle below in conjunction with PDLC specifies the embodiment of the invention.

Figure 2 shows that the optical axis structural representation of the liquid crystal droplet among the PDLC, the n among the figure_o, n_eRepresent ordinary refraction index and extraordinary ray refractive index in the liquid crystal droplet respectively, arrow n represents the pointing vector direction of this liquid crystal droplet.If n_eWith the angle of n be θ, the effective refractive index n of this liquid crystal droplet then_gFor:

$n_g=n_o{n}_e/{(n_o^2{\sin }^2\mathrm{\θ}+n_e^2{\cos }^2\mathrm{\θ})}^{1/2}=n_o{n}_e/{\left[(n_o^2-n_e^2){\sin }^2\mathrm{\θ}{+n}_e^2\right]}^{1/2}---\left(1\right)$

Refractive index effective refractive index n when liquid crystal droplet_gWith refractive index polymer n_pWhen unequal, incident ray can produce scattering on droplet and polymkeric substance interphase, make the light intensity decreasing through pdlc film, and promptly the optical transmission rate reduces.

Fig. 3 A is depicted as the structural representation of PDLC box when not having extra electric field, as shown in Fig. 3 A, the potpourri ofpolymkeric substance 31 andliquid crystal 32 is clipped betweensubstrate 34 withtransparency electrode 33 and thesubstrate 36 with transparency electrode 35.Wherein, the straight line among the figure in the liquid crystal droplet is represented the pointing vector direction of this liquid crystal droplet, the n among the figure_o, n_e, n_PWith said n_o, n_e, n_PThe implication unanimity, and get n_o=n_PWhen the impressed voltage on two lateral electrodes of PDLC box was zero, the optical axis direction of each liquid crystal droplet is stochastic distribution in the PDLC box, occurred refractive index mismatch situation (the i.e. effective refractive index n of liquid crystal droplet at this moment between part liquid crystal droplet and the polymkeric substance_G1≠ n_P), so incident light is in the surface scattering of these liquid crystal droplets, this moment, the PDLC box had a minimum transmitance (minimum transmitance is zero or some values of non-zero, is 20% as transmitance).

Fig. 3 B is the PDLC box structural representation that has applied extra electric field.Shown in Fig. 3 B, apply voltage on the transparency electrode to thesubstrate 34 of this PDLC box andsubstrate 36, then the liquid crystal molecule in the liquid crystal droplet is subjected to electric field torque rotation optical axis.If the impressed voltage value is V, then: as 0＜V＜V_Th(V_ThThreshold voltage for this PDLC) time, the extraordinary axes of the liquid crystal molecule in the liquid crystal droplet is understood part or is trended towards the direction of electric field by halves, and the extraordinary axes of liquid crystal droplet and the angle of pointing vector can be than PDLC box relative reducing during added electric field not, the effective refractive index n when therefore this moment, visible light was by liquid crystal droplet_G2＞n_G1And when the making alive V of institute reached the threshold voltage of the liquid crystal among this PDLC, the extraordinary axes of liquid crystal molecule and pointing vector all will be along directions of an electric field in each liquid crystal droplet, and this moment, visible light passed through the effective refractive index n of liquid crystal droplet_G3=n_o, promptly the effective refractive index of the liquid crystal droplet in the PDLC box is identical with the refractive index of polymkeric substance, and incident light can not have scattering ground directly by this PDLC box, and this moment, this PDLC box had a maximum transmission, was clear state.

Therefore, the PDLC material can change with the variation that is applied to the electric field on the PDLC material visible scattering of light degree, the scattered power that is the PDLC box is the function of the impressed voltage value on two lateral electrodes of current PDLC box, therefore, the embodiment of the invention provides a kind of 2D/3D switchable stereo display device, as shown in Figure 4, this 2D/3D switchable stereo display device comprises: display panel 11,PDLC box 41,voltage control unit 42 and 2D/3Dswitching device shifter 12.

Wherein, display panel 11 for existing any can be by the device of optical modulation display image, this device is incident to describedPDLC box 41 subsequently with emergent light.Generally speaking, display panel 11 is that emergent light is the LCD display (as the TFT display panel) of linearly polarized light.When the emergent light of display panel 11 is the nonlinear polarization light time, can be between the display panel 11 of nonlinear polarization light and thePDLC box 41 polarizer to be set at emergent light, perhaps, betweenPDLC box 41 and 2D/3Dswitching device shifter 12, need to be provided with a polarizer, that is: the nonlinear polarization light of display panel 11 outgoing is earlier byPDLC box 41, by the polarizer, be linearly polarized light again with the incident light that guarantees the 2D/3D switching device shifter.Described emergent light is that the display panel 11 of nonlinear polarization light can be LCD display, CRT monitor, Plasmia indicating panel (Plasma Display Panel, PDP), organic light emitting diode display (Organic Light Emitting Display, OLED), Field Emission Display (Field EmissionDisplay, a kind of in FED).

2D/3Dswitching device shifter 12 shows as the device of 2D and two changeable mode of operations of 3D for existing any to incident ray polarized light.For example, the composite set of the lens subassembly that this unit can constitute for disclosed polarized light conversion device among the CN101114055 and by single refraction rate lens and refraction of birefringence lens, wherein, polarized light conversion device can be a twisted liquid crystal panel with TFT matrix structure.Perhaps, 2D/3Dswitching device shifter 12 can also be the combination of lenses device of the single refraction rate lens that can realize 2D and two changeable mode of operations of 3D and refraction of birefringence lens that can be automatically controlled.

The voltage output device thatvoltage control unit 42 can be regulated and control for output voltage amplitude.Two voltage output end mouths ofvoltage control unit 42 are electrically connected with transparency electrode on the both sides substrate ofPDLC box 41 respectively, andvoltage control unit 42 is exported the impressed voltage of various amplitudes by the transparency electrode of described voltage output end mouth on the substrate of the both sides ofPDLC box 41, and promptly the PDLC material inPDLC box 41 provides variable electric field.

Below for convenience of description, be that the display panel 11 of linearly polarized light specifies the embodiment of the invention for example with the emergent light.

In the device shown in Figure 4, output voltage by regulationvoltage control module 42 is so that the PDLC material in thePDLC box 41 obtains suitable scattered power under the extra electric field effect, thereby avoid when the 2D/3D switchable stereo display device will show two dimensional image, the excessive scattering of the pixel light of 41 pairs of display panel 11 outgoing of PDLC box, with respect to prior art, can effectively improve the brightness and the sharpness of the two dimensional image of 2D/3D switchable stereo display device demonstration.If after removingPDLC box 41, Moire fringe was apparent in view when the 2D/3D switchable stereo display device was in the 3-D display pattern, then need to make the output voltage of thevoltage control unit 42 among Fig. 4 to be lower than the threshold voltage ofPDLC box 41 all the time, could guarantee thatPDLC box 41 destroys the Moire fringe that the structure acting in conjunction of the two-dimentional pixel plane architecture of this display panel 11 and the twisted liquid crystal panel in the 2D/3Dswitching device shifter 12 generates under scattering state.If after removingPDLC box 41, the 2D/3D switchable stereo display device does not have Moire fringe or Moire fringe to differentiate when being in the 3-D display pattern, then when the 2D/3D switchable stereo display device among Fig. 4 need show 3-D view, can make the output voltage ofvoltage control unit 42 be higher than thisPDLC box 41 corresponding threshold voltages, this moment, the PDLC box was in pellucidity, and the display brightness of this 2D/3D switchable stereo display device is improved.

Embodiment 1 Figure 5 shows that the detailed structure synoptic diagram of a kind of 2D/3D switchable stereo display device that the embodiment of the invention 1 provides.As shown in Figure 5, the 2D/3D switchable stereo display device comprises: provide thedisplay panel 51 of two dimensional image, by the PDLC box and the 2D/3D switching device shifter ofvoltage control unit 54 control nephelometric turbidity units.

Described PDLC box carrysubstrate 53a, the 53b of transparency electrode by two and be encapsulated in 53a and 53b betweenPDLC material 52 constitute.Transparency electrode (not shown) on twosubstrates 53a, the 53b is electrically connected with voltage output end A, the B of describedvoltage control unit 54 respectively.

Described 2D/3D switching device shifter specifically comprises: be responsible for revolving the polarized light conversion device that turn 90 degrees, the linear polarization light direction of vibration that provides by the PDLC box is not provided under the 3D situation at the linear polarization light direction of vibration that will provide by the PDLC box under the 2D situation, and the lens subassembly that constitutes by single refraction rate lens and refraction of birefringence lens.Described polarized light conversion device structure is similar to general TN type liquid crystal cell, by two itoglass 55a, 55b, andoriented layer 56a, 56b, and nematicliquid crystal 57 formations that are encapsulated inoriented layer 56a, 56b inside, nematicliquid crystal 57 has the TFT matrix structure; Voltage source is connected on itoglass 55a, the 55b byelectrode 511a and 511b, vertical 90 degree of two oriented layer molecular orientation.The structure of described lens subassembly is by single refraction rate convexlens 58, and birefractionconcavees lens 59 andglass substrate 510 are formed.Wherein, need on the interface of single refraction rate convexlens 58 and birefractionconcavees lens 59 through orientation process, 56c is schematic oriented layer among Fig. 5.For 2D, the 3D switch operating principle of this 2D/3D switching device shifter, specifically can referring to publication number be CN101114055 in first to file, be not described in detail in this.In addition, remove the drawn 2D/3D switching device shifter of Fig. 5, the 2D/3D switching device shifter described in the present embodiment can comprise that also other can realize the 2D/3D device for switching in the 2D/3D switching device shifter of disclosed all the other forms among the CN101114055 and the prior art.

Fig. 6 A is a 2D/3D switchable stereo display device shown in Figure 5 index path when being in two dimensional mode.Wherein, no-voltage input betweenelectrode 511a in the 2D/3D switching device shifter and the 511b, be that the 2D/3D switching device shifter is in 2D mode of operation (principle of work of this 2D/3D switching device shifter is please referring to open file CN101114055), then the output voltage of regulationvoltage control module 54 is so that the PDLC box is in scattering state, can not differentiate until the Moire fringe that this 2D/3D switchable stereo display device produces, can obtain two dimensional image display effect preferably.

When the electrode on the both sides pole plate of the nematicliquid crystal 57 in the 2D/3D switching device shifter shown in Figure 5 is applied in voltage, the 2D/3D switching device shifter transfers the 3D mode of operation to, the output voltage of regulationvoltage control module 54 makes the PDLC box obtain suitable scattered power (also can make the scattered power minimum) to eliminate Moire fringe once more, be the index path ofPDLC box 2D/3D switchable stereo display device when being in pellucidity fully shown in Fig. 6 B, this moment, this 2D/3D switchable stereo display device had higher brightness and sharpness.

Embodiment 2 Figure 7 shows that the detailed structure synoptic diagram of a kind of 2D/3D switchable stereo display device that the embodiment of the invention 2 provides.

As shown in Figure 7, this 2D/3D switchable stereo display device comprises: display panel 71, theadjustable PDLC box 72 of scattered power and 2D/3D switching device shifter 73.Wherein, 2D/3Dswitching device shifter 73 specifically comprises: thesubstrate 76 that 75, surfaces of post lenticulation made from birefringent material are the plane, and be filled in twistedliquid crystal 78 betweenpost lenticulation 75 and the substrate 76.Wherein,post lenticulation 75 is the plane in the face of the one side of the exit facet ofPDLC box 72, and the opposite on this plane is protruding (or recessed) face that parallel is shown a plurality of half-cylindrical lens, and the bus on each face of cylinder is parallel with the row on two-dimensional pixel matrix plane 22;Substrate 76 is by isotropic material, as: glass, plastics etc. is made.All be covered with the conducting film (not shown) on the opposite face ofpost lenticulation 75 andsubstrate 76, all be coated withalignment films 77 on two conducting films, and the direction of orientation of two alignment films be vertical mutually.Because it has been known technology that 2D and 3D switch display technique in detail, therefore the principle of work of 2D/3D switching device shifter shown in Figure 7 is described in detail no longer.

Be similar to embodiment 1, in the 2D/3D switchable stereo display device shown in Figure 7, can come the scattered power of dynamicadjustments PDLC box 72 by the output voltage of regulating a voltage control unit 74.Promptly when needs show two dimensional image, increase the PDLC box and can not differentiate until Moire fringe the scattering degree of incident ray; When needs show 3-D view, because More's interference that displaypanel 71 and 2D/3D switching device shifter are 73 can suitably reduce, then with respect to two dimensional mode, can suitably reduce the scattered power ofPDLC box 72 this moment, can improve the quality of the three-dimensional image of this 2D/3D switchable stereo display device demonstration like this under the prerequisite that does not produce Moire fringe.

The foregoing description only is exemplary, and principle of the present invention is equally applicable to other 2D/3D switchable stereo display device with similar structures.For example: for the 2D/3D switching device shifter that on the light working direction, is provided with multilayer TFT panel, the generation Moire fringe owing to can influence each other between per two adjacent TFT panels, therefore also can adopt principle of the present invention, between per two adjacent TFT panels, the adjustable PDLC box of scattered power is set, to eliminate the issuable Moire fringe of this 2D/3D switching device shifter.

By the such scheme that the embodiment of the invention provides, can eliminate the Moire fringe on the imaging surface of 2D/3D switchable stereo display device effectively.

Above-mentioned embodiment only is schematic; rather than restrictive, those skilled in the art is not breaking away under the scope situation that this method aim and claim protect under the enlightenment of this method; can also make a lot of distortion, these all belong within protection scope of the present invention.

Claims (9)

1. 2D/3D switchable stereo display device, comprise: display panel and 2D/3D switching device shifter, the light of described display panel outgoing is linearly polarized light, it is characterized in that, also comprise: be arranged between described display panel and the described 2D/3D switching device shifter, the adjustable condensate dispersal type of scattered power liquid crystal PDLC device, this PDLC device is used for the emergent light scattering of described display panel or directly is transmitted through described 2D/3D switching device shifter.

2. 2D/3D switchable stereo display device, comprise: display panel and 2D/3D switching device shifter, the light of described display panel outgoing is nonlinear polarization light, it is characterized in that, also comprises the adjustable condensate dispersal type of the scattered power liquid crystal PDLC device and the polarizer; The described polarizer is between described display panel and described 2D/3D switching device shifter, described PDLC device is between the described display panel and the described polarizer or between the described polarizer and described 2D/3D switching device shifter, and described PDLC device is used for the light scattering of incident or directly transmission.

3. a kind of 2D/3D switchable stereo display device as claimed in claim 2, it is characterized in that described display panel is a kind of in LCD, cathode-ray tube display, Plasmia indicating panel, organic light emitting diode display, the Field Emission Display.

4. a kind of 2D/3D switchable stereo display device as claimed in claim 1 or 2 is characterized in that, described PDLC device comprises: the PDLC material reaches the device that variable electric field is provided for this PDLC material.

5. a kind of 2D/3D switchable stereo display device as claimed in claim 1 or 2 is characterized in that described 2D/3D switching device shifter comprises: polarized light conversion device and lens subassembly;

Described polarized light conversion device, be used for being incident to described lens subassembly after the direct transmission of first linearly polarized light with incident, perhaps, first linearly polarized light of incident is rotated into second linearly polarized light vertical with this polarized light polarization direction, and second linearly polarized light is incided described lens subassembly;

Lens subassembly, described first linearly polarized light show as first trend during by this lens subassembly, and described second linearly polarized light shows as with described first during by this lens subassembly and moves towards the second different trends.

6. a kind of 2D/3D switchable stereo display device as claimed in claim 5 is characterized in that, described polarized light conversion device comprise can be automatically controlled twisted liquid crystal.

7. a kind of 2D/3D switchable stereo display device as claimed in claim 5 is characterized in that described polarized light conversion device has thin-film transistor structure.

8. a kind of 2D/3D switchable stereo display device as claimed in claim 1 or 2 is characterized in that, described 2D/3D switching device shifter comprises by single refraction rate lens and the lens subassembly can automatically controlled refraction of birefringence lens formed.

9. a kind of 2D/3D switchable stereo display device as claimed in claim 8 is characterized in that, describedly can automatically controlled refraction of birefringence lens comprise liquid crystal material.

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