CN201199726Y - Low-dispersion 2D-3D switching type stereo display device - Google Patents
Low-dispersion 2D-3D switching type stereo display device Download PDFInfo
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- CN201199726Y CN201199726Y CNU200820108181XU CN200820108181U CN201199726Y CN 201199726 Y CN201199726 Y CN 201199726Y CN U200820108181X U CNU200820108181X U CN U200820108181XU CN 200820108181 U CN200820108181 U CN 200820108181U CN 201199726 Y CN201199726 Y CN 201199726Y
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Abstract
The utility model discloses a low-scattering 2D-3D switching type stereo display device which comprises a display device, a polarized light conversion device and a double-refraction combination lens. The double-refraction combination lens comprises a plurality of parallel grooves and a liquid crystal material parallel to the orientation of the grooves, and the direction of the grooves and any group of parallel stripes in the optical field of the two-dimensional structure of the display device from a specific included angle; the polarized light conversion device causes the linearly polarized light provided by the display device to carry out controllable rotation or direct transmission so as to provide two linearly polarized lights with mutually vertical polarization directions for the double-refraction combination lens, and the polarization direction of one of the two linearly polarized lights is parallel to the liquid crystal orientation of the double-refraction combination lens; the two linearly polarized lights with mutually vertical polarization directions and provided for the polarized light conversion device by the double-refraction combination lens are respectively presented as a convex lens and a plate lens. The display definition of the low-scattering 2D-3D switching type stereo display device is high, and the display device does not turn white under the close-down situation.
Description
Technical field
The utility model relates to the stereo display field, relates in particular to a kind of low scattering 2D-3D suitching type 3 d display device.
Background technology
Development along with stereo display technique, 2D-3D suitching type 3 d display device arises at the historic moment, this kind display unit can show two dimensional image or 3-D view according to beholder's needs, for the display unit that only has single three-dimensional display function, has wider market prospects.
Fig. 1 is a kind of existing 2D-3D suitching type 3 d display device, and this device comprises: LCD 11, twisted nematic liquid crystal box 12 and birefringence compound lens 13.Wherein, LCD 11 is used to show that emergent light is the plane picture of level/vertical curve polarised light, and the linearly polarized light of along continuous straight runs or vertical direction vibration promptly is provided to twisted nematic liquid crystal box 12.The twist angle of described twisted nematic liquid crystal box 12 is 90 degree, and consistent with the linear polarization direction of light of incident near the frictional direction (direction shown in the dotted arrow among the figure) of LCD 11 substrate simultaneously.Described birefringence compound lens 13 comprises: convex lens array 14 and concavees lens array 15, the on-plane surface complementation of described convex lens array 14 and described concavees lens array 15; The emergent ray polarization direction of light consistent (being along continuous straight runs or vertical direction) of the groove direction of described concavees lens array 14 and LCD 11; Described convex lens array 14 inside are full of liquid crystal, and the orientation of described liquid crystal is parallel or perpendicular to the exit facet frictional direction of described twisted nematic liquid crystal box 12.Below for convenience of description, the ordinary refraction index of establishing described liquid crystal material is n
o, the extraordinary ray refractive index is n
e(n
o＜n
e), the refractive index n of concavees lens array 15
pBe n
p=n
o
Fig. 2 A and Fig. 2 B are the profile of device shown in Figure 1, and this section is perpendicular to the liquid crystal aligning direction of birefringence compound lens 13, below by Fig. 2 A and Fig. 2 B the optics displaying principle of device shown in Figure 1 are described.
Among Fig. 2 A, come from LCD 11, the polarization direction is incident on the twisted nematic liquid crystal box 12 perpendicular to the linearly polarized light 200 of figure paper plane shown in Fig. 2 A; There is not this moment the twisted nematic liquid crystal box 12 of applied voltage will reverse perpendicular to the incident ray polarized light 200 of paper vibration to being parallel to linearly polarized light 201 outgoing of paper vibration; Because the direction of vibration of linearly polarized light 201 is vertical mutually with the liquid crystal aligning in the convex lens array 14, the polarization direction that is linearly polarized light 201 is perpendicular to the long axis of liquid crystal molecule direction in the convex lens array 14, therefore, the linearly polarized light 201 of 14 pairs of vertical incidence of convex lens array shows as ordinary refraction index n
o, again because the n of concavees lens array 15
p=n
oSo linearly polarized light 201 does not produce refraction on the interface of convex lens array 14 and concavees lens array 15, be that linearly polarized light 201 keeps former polarization characteristic straight-line pass birefringence compound lens 13, this moment, this 2D-3D suitching type 3 d display device showed two dimensional image.
Among Fig. 2 B, come from LCD 11, the polarization direction is incident on the twisted nematic liquid crystal box 12 of applied voltage perpendicular to the linearly polarized light 200 of figure paper plane shown in Fig. 2 A, and described applied voltage is not less than the threshold voltage of this twisted nematic liquid crystal box 12, then under External Electrical Field, long axis of liquid crystal molecule direction in the twisted nematic liquid crystal box 12 is identical with the direction of propagation of incident ray polarized light 200, incident ray polarized light 200 keeps being incident on the convex lens array 14 behind this twisted nematic liquid crystal box 12 of former polarization characteristic straight-line pass, this moment is because the polarization direction of linearly polarized light 200 is parallel to the long axis of liquid crystal molecule direction in the convex lens array 14, so the linearly polarized light 200 of 14 pairs of vertical incidence of convex lens array shows as the extraordinary ray refractive index n
e, again because the n of concavees lens array 15
p=n
o＜n
eSo linearly polarized light 200 produces refraction effect on the interface of convex lens array 14 and concavees lens array 15, this moment, 2D-3D suitching type 3 d display device showed 3-D view.
The principle of above-mentioned 2D-3D suitching type 3 d display device embodies in Chinese patent CN1539095 to some extent, specifically can be referring to this patent.
In the device shown in Figure 1, the two-dimensional structure light field that LCD 11 pixel planes are produced when showing can be interfered mutually with the light field that birefringence compound lens 13 produces and be produced Moire fringe, and when arbitrary group of parallel striped is parallel with the groove direction of described birefringence compound lens 13 in the two-dimensional structure light field that LCD 11 produces, the spatial frequency of the two-dimensional structure light field that the spatial frequency of the light field that birefringence compound lens 13 produces can produce with LCD 11 is close, the Moire fringe that generate this moment has clearly had a strong impact on the display effect of this device.For addressing the above problem, birefringence compound lens 13 shown in the birefringence compound lens alternate figures 1 after improvement of available technology adopting, arbitrary group of parallel striped in the two-dimensional structure light field that the groove direction of the birefringence compound lens after the described improvement and LCD 11 produces forms a fixed angle.Obviously, with respect to birefringence compound lens 13 shown in Figure 1, produced than big-difference between the spatial frequency of the two-dimensional structure light field that the spatial frequency of the light field that birefringence compound lens after the improvement produces and LCD 11 produce, so interfered mutually between birefringence compound lens and the LCD and the Moire fringe of generation is minimized.In addition, because the emergent light that the inclined notches formed face can refracted portion LCD 11, destroy the regularity of the two-dimensional structure light field of LCD, further reduced Moire fringe.
By the explanation of front as can be known, twisted nematic liquid crystal box 12 provides two orthogonal linearly polarized lights in polarization direction, the orientation of liquid crystal is parallel to a kind of polarization direction in two kinds of linearly polarized lights of described twisted nematic liquid crystal box 12 outgoing in the birefringence compound lens, arbitrary group of parallel fixed angle of striped formation in the groove direction of the birefringence compound lens that adopts in the 2D-3D suitching type 3 d display device and the two-dimensional structure light field that LCD 11 produces then, and the groove direction of birefringence compound lens had been both not parallel when also being not orthogonal to the polarization direction of emergent ray polarised light of twisted nematic liquid crystal box 12, and the liquid crystal aligning in the birefringence compound lens is not parallel to groove direction.Elastic theory according to non-individual body, liquid crystal molecule near groove surfaces can tend to arrange so that the elastic energy minimum along groove direction, therefore, if the birefringence compound lens that groove tilts is done section along the liquid crystal aligning direction, then as shown in Figure 3: the major axis of the liquid crystal molecule at the interface place (groove surfaces) of close convex lens array and concavees lens is not orthogonal to the plane shown in the drawing in the birefringence compound lens, these liquid crystal molecules that are not orthogonal to plane shown in the drawing can carry out scattering to the linearly polarized light of vertical incidence (among Fig. 3 be example with the ordinary light), promptly for the linearly polarized light of vertical incidence to the birefringence compound lens, the birefringence compound lens is the lens of a variable refractivity, so not only reduce the 2D and the 3D display effect of this device, and when this device is closed, made display turn white.
The utility model content
The purpose of this utility model is to provide a kind of low scattering 2D-3D suitching type 3 d display device, and this device has improved display resolution, and shows the phenomenon of turning white when having solved 2D-3D suitching type 3 d display device of the prior art and closing.
A kind of low scattering 2D-3D suitching type 3 d display device, this device comprises: display unit, polarized light conversion device and birefringence compound lens; Described polarized light conversion device is arranged between described display unit and the described birefringence compound lens; Described birefringence compound lens comprises convex lens array and concavees lens array, the male and female face complementation of described convex lens array and described concavees lens array, and arbitrary group of parallel stripes in the two-dimensional structure light field of the groove direction of described concavees lens array and described display unit becomes a non-zero included angle, and one among described convex lens array and the described concavees lens array is liquid crystal material; The liquid crystal aligning direction of described birefringence compound lens is parallel to the groove direction of described concavees lens array;
The plane picture light of described display unit outgoing is linearly polarized light;
Described polarized light conversion device, the linearly polarized light that is used to described display unit is provided carries out controllable rotation or directly transmission, provides two kinds of orthogonal linearly polarized lights in polarization direction with this to described birefringence compound lens; The polarization direction of a kind of linearly polarized light among described two kinds of orthogonal linearly polarized lights in polarization direction is parallel to the liquid crystal aligning direction of described birefringence compound lens;
Described birefringence compound lens, two kinds of orthogonal linearly polarized lights in polarization direction that described polarized light conversion device is provided show as convex lens and plano lens respectively.
In the described low scattering 2D-3D suitching type 3 d display device, if the linearly polarized light of described display unit outgoing is not parallel to the liquid crystal aligning direction of described birefringence compound lens, described polarized light conversion device comprises: the phase delay device and the first twisted nematic liquid crystal box; Described phase delay device is used for the linearly polarized light that described display unit provides is rotated into a kind of of described two kinds of orthogonal linearly polarized lights in polarization direction; The twist angle of the described first twisted nematic liquid crystal box is 90 degree, be used for when not having applied voltage, the linearly polarized light of described phase delay device outgoing is rotated to be the perpendicular linearly polarized light in polarization direction, or during greater than threshold voltage, make the direct transmission of linearly polarized light of incident at applied voltage.
Described phase delay device is a half-wave plate.
Described half-wave plate is birefringece crystal material or nematic liquid crystal material.
In the described low scattering 2D-3D suitching type 3 d display device, if the linearly polarized light of described display unit outgoing is not parallel to the liquid crystal aligning direction of described birefringence compound lens, described polarized light conversion device comprises: the second twisted nematic liquid crystal box and the 3rd twisted nematic liquid crystal box; The described second twisted nematic liquid crystal box is used for the linearly polarized light that described display unit provides is rotated into a kind of of described two kinds of orthogonal linearly polarized lights in polarization direction; The twist angle of described the 3rd twisted nematic liquid crystal box is 90 degree, be used for when not having applied voltage, the polarised light of the described second twisted nematic liquid crystal box outgoing is rotated to be the perpendicular linearly polarized light in polarization direction, or during greater than threshold voltage, make the direct transmission of linearly polarized light of incident at applied voltage.
In the described low scattering 2D-3D suitching type 3 d display device, if the linearly polarized light of described display unit outgoing is not parallel to the liquid crystal aligning direction of described birefringence compound lens, described polarized light conversion device is the 4th twisted nematic liquid crystal box: be used for when not having applied voltage, the linearly polarized light that described display unit is provided rotates to be a kind of in described two kinds of orthogonal linearly polarized lights in polarization direction, or when applied voltage was predetermined voltage, the linearly polarized light that described display unit is provided rotated the another kind in described two kinds of orthogonal linearly polarized lights in polarization direction.
In the described low scattering 2D-3D suitching type 3 d display device, if the linearly polarized light of described display unit outgoing is parallel to the liquid crystal aligning direction of described birefringence compound lens, described polarized light conversion device is that twist angle is the 5th a twisted nematic liquid crystal box of 90 degree, be used for when not having applied voltage, the linearly polarized light that described display unit is provided is rotated into the perpendicular linearly polarized light outgoing in polarization direction, and at applied voltage during greater than threshold voltage, the linearly polarized light that described display unit is provided directly is transmitted through described birefringence compound lens.
Above-mentioned display unit is that the plane picture light of outgoing is the display of linearly polarized light; Perhaps, described display unit comprises: the plane picture light of outgoing is the polarizer on the display of nonlinear polarization light and the exit facet that is arranged at described display.
In the above-mentioned low scattering 2D-3D suitching type 3 d display device that the utility model provides, polarized light conversion device carries out controllable rotation or straight saturating to the emergent ray polarised light of display unit, with provide parallel/perpendicular to the linearly polarized light of the liquid crystal aligning of described birefringence compound lens, again because the liquid crystal aligning of birefringence compound lens is consistent with groove direction.Therefore, this birefringence compound lens has single refractive index to the linearly polarized light of vertical incidence, can not make the linearly polarized light of incident produce scattering, not only improve the definition of 2D-3D suitching type 3 d display device, and solved the phenomenon that demonstration was turned white when 2D-3D suitching type 3 d display device was closed in the prior art.
Description of drawings
Fig. 1 is a kind of existing 2D-3D suitching type 3 d display device structural representation;
Fig. 2 A is that the 2D of device shown in Figure 1 shows index path;
Fig. 2 B is that the 3D of device shown in Figure 1 shows index path;
Fig. 3 is that the birefringence compound lens that tilts of prior art further groove direction is at the profile perpendicular to the liquid crystal aligning direction;
The wherein a kind of low scattering 2D-3D suitching type 3 d display device structural representation that Fig. 4 provides for the utility model embodiment;
The wherein a kind of low scattering 2D-3D suitching type 3 d display device structural representation that Fig. 5 provides for the utility model embodiment;
The wherein a kind of low scattering 2D-3D suitching type 3 d display device structural representation that Fig. 6 provides for the utility model embodiment;
The wherein a kind of low scattering 2D-3D suitching type 3 d display device structural representation that Fig. 7 provides for the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing, specify the utility model embodiment.The utility model embodiment for convenience of description, below the direction that is parallel to the bottom of the display unit shown in the figure in institute's drawings attached is called horizontal direction, calculating to any inclination angle is reference direction with this horizontal direction all, and will be when display unit is watched, counterclockwise as the positive direction of angle.
The utility model embodiment provides a kind of low scattering 2D-3D suitching type 3 d display device, and along optical path direction, this device comprises successively: display unit, polarized light conversion device and birefringence compound lens.Wherein, described birefringence compound lens comprises: convex lens array and concavees lens array, the male and fomale(M﹠F) complementation of described convex lens array and concavees lens array.There is a certain degree in arbitrary group of parallel stripes in the two-dimensional structure light field that the groove direction of described birefringence compound lens and described display unit produce, make by liquid crystal material for one among described convex lens array and the described concavees lens array, and the orientation of liquid crystal is parallel to groove direction.
Display unit is used for the display plane image, and the light that described plane picture produces is linearly polarized photon, below for convenience of description, this linearly polarized photon is called first linearly polarized light, for example, the polarization angle of described first linearly polarized light is α.What deserves to be explained is, described display unit can be the LCD of linearly polarized light for existing emergent light not only, also can be for emergent light is the display of non-linear polarization light and the combination that is disposed at the polarizer on its exit facet, the polarizing angle degree of described polarizer is α.In addition, the pixel of described display unit can be any arrangement mode, below for convenience of description, if striped along continuous straight runs in the two-dimensional structure light field that the display unit that adopts in the present embodiment produces and vertical direction are arranged, then the groove inclination angle of the birefringence compound lens of Cai Yonging is θ (θ ≠ 0 ° and θ ≠ 90 °).
Polarized light conversion device, first linearly polarized light that is used to display unit is provided carries out controllable rotation or directly transmission, and provides two kinds of orthogonal linearly polarized lights in polarization direction to described birefringent lens.The polarization direction of a kind of linearly polarized light among two kinds of orthogonal linearly polarized lights in polarization direction described herein is parallel to the liquid crystal aligning direction (polarization angle that is linearly polarized light is θ) of described birefringence compound lens, below for convenience of description, the linearly polarized light that the polarization direction of polarized light conversion device outgoing is parallel to the liquid crystal aligning direction of described birefringence compound lens is called second linearly polarized light, and the polarization direction is called the 3rd linearly polarized light perpendicular to the linearly polarized light of second linearly polarized light.
Described birefringence compound lens is used for second linearly polarized light that described polarized light conversion device is provided and of the 3rd linearly polarized light and shows as convex lens, and another one is shown as plano lens.
When α=θ, the polarization direction of first linearly polarized light of display unit outgoing just is parallel to the liquid crystal aligning direction of described birefringence compound lens, and at this moment, above-mentioned second linearly polarized light is equal to first linearly polarized light.Described polarized light conversion device can be implemented as the twisted nematic liquid crystal box that a twist angle is 90 degree, the plane of incidence frictional direction of this twisted nematic liquid crystal box is parallel to the polarization direction of described first polarised light, and the frictional direction of exit facet is perpendicular to the liquid crystal aligning direction of described birefringence compound lens.When not having applied voltage, first linearly polarized light that this twisted nematic liquid crystal box provides display unit rotates to be the 3rd linearly polarized light outgoing; When the applied voltage of described twisted nematic liquid crystal box during greater than threshold voltage, first linearly polarized light that this twisted nematic liquid crystal box provides described display unit directly is transmitted through described birefringence compound lens.
When α ≠ θ, polarized light conversion device in the low scattering 2D-3D suitching type 3 d display device that the utility model embodiment provides can have multiple implementation, for example, polarized light conversion device can be the combination of the twisted nematic liquid crystal boxes of 90 degree for phase delay device and twist angle, it perhaps is the combination of a plurality of twisted nematic liquid crystal boxes, perhaps can also adopt a distortion angle be non-90 degree can be automatically controlled twisted nematic liquid crystal box etc., below respectively the linearly polarized light of display unit outgoing is not parallel to the liquid crystal aligning direction of described birefringence compound lens the various realization situations of low scattering 2D-3D suitching type 3 d display device describe.
Figure 4 shows that the wherein a kind of low scattering 2D-3D suitching type 3 d display device structural representation that the utility model embodiment provides, along optical path direction, this device comprises successively: display unit 41, phase delay device 42, twisted nematic liquid crystal box 43 and birefringence compound lens 44.Wherein, the operation principle of display unit 41 and birefringence compound lens 44 is consistent with foregoing display unit and birefringence compound lens, is not described in detail in this.
Preferably, described phase delay device 42 is a half-wave plate.By the optical property of half-wave plate as can be known: can be converted to second linearly polarized light for making first linearly polarized light, the optical axis direction angle of this half-wave plate (among Fig. 4 on the phase delay device 42 shown in solid arrow) should be
In addition, the optical axis direction angle as if this half-wave plate is
Then this half-wave plate converts first linearly polarized light to the 3rd linearly polarized light.Described half-wave plate can be birefringece crystal materials such as quartz, can also be nematic liquid crystal material.When described half-wave plate is nematic liquid crystal material, fix for making nematic liquid crystal material, can implement these as a nematic liquid crystal box.Described nematic liquid crystal box is made of two plate plane substrates and the nematic liquid crystal that is filled between the two substrates, and the pointing vector direction of described nematic liquid crystal is the optical axis direction of half-wave plate, promptly the angle of the pointing vector of described nematic liquid crystal can for
Or
In addition, by the optical path difference formula of half-wave plate as can be known: the nematic liquid crystal box as described half-wave plate need satisfy:
Wherein Δ n is the anisotropy of the refractive index of the nematic liquid crystal that adopted, and d is the thickness of liquid crystal layer in this nematic liquid crystal box, and λ is the wavelength of incident ray polarized light.Be understandable that except that above-mentioned half-wave plate, described phase delay device 42 can also be other the phase delay device that first linearly polarized light can be converted to second/the 3rd linearly polarized light.
Twisted nematic liquid crystal box 43 is used under different applied voltage control for existing any twist angle is the twisted nematic liquid crystal box of 90 degree, and the linearly polarized light that described phase delay device 42 is provided converts second linearly polarized light and the 3rd linearly polarized light to.The frictional direction of a substrate among the described twisted nematic liquid crystal box 43 both sides substrates is parallel to the liquid crystal aligning of described birefringence compound lens 44, and the frictional direction of another substrate is perpendicular to the liquid crystal aligning of described birefringence compound lens 44.For example shown in Fig. 4: near the one side of phase delay device 42, the frictional direction of the substrate of twisted nematic liquid crystal box 43 can be taken as θ, and near the one side of birefringence compound lens 44, and the frictional direction of the substrate of this twisted nematic liquid crystal box 43 can be taken as θ+90 °.Obviously, as shown in Figure 4, the operation principle of twisted nematic liquid crystal box 43 is: when twisted nematic liquid crystal box 43 no applied voltages (applied voltage value be zero), twisted nematic liquid crystal box 43 is converted to the 3rd linearly polarized light (angle, polarization direction be θ+90 °) outgoing with second linearly polarized light (angle, polarization direction is θ) of incident, and perhaps the 3rd linearly polarized light with incident converts the second linearly polarized light outgoing to; When twisted nematic liquid crystal box 43 had applied voltage and applied voltage greater than threshold voltage, twisted nematic liquid crystal box 43 made the direct transmission of second linearly polarized light of incident, perhaps made the direct transmission of the 3rd linearly polarized light of incident.Obviously, the frictional direction of the two sides substrate of the twisted nematic liquid crystal box 43 shown in Fig. 4 can exchange, frictional direction near the substrate of the one side of phase delay device 42 and be taken as θ+90 °, and will be taken as θ near the frictional direction of the substrate of the one side of birefringence compound lens 44, also can realize identical technique effect, be not described in detail in this.
Figure 5 shows that another low scattering 2D-3D suitching type 3 d display device structural representation that the utility model embodiment provides, along optical path direction, this device comprises successively: display unit 41, twisted nematic liquid crystal box 51, twisted nematic liquid crystal box 43 and birefringence compound lens 44.Wherein, have the operation principle of display unit 41, twisted nematic liquid crystal box 43 and birefringence compound lens 44 of same reference numerals and noted earlier consistent, be not described in detail in this with Fig. 4.
Twisted nematic liquid crystal box 51 for existing arbitrary money distortion angle is | θ-α | or | θ+90 °-α | twisted liquid crystal (as previously mentioned, θ is the groove inclination angle of birefringence compound lens 44, and α is the polarization angle of the emergent ray polarised light of display unit 41).Near the one side of display unit 41, the angle of the substrate frictional direction of this twisted nematic liquid crystal box 51 (as the dotted arrow shown on the twisted nematic liquid crystal box 51 among Fig. 5) is α; And in the face of the one side of twisted nematic liquid crystal box 43, the angle of the substrate frictional direction of twisted nematic liquid crystal box 51 is θ (shown in the solid arrow on the twisted nematic liquid crystal box 51 among Fig. 5) or θ+90 ° (not shown among Fig. 5).Obviously, when the angle of the frictional direction of the exit facet substrate of twisted nematic liquid crystal box 51 was θ, first linearly polarized light that described twisted nematic liquid crystal box 51 provides display unit 41 was converted to the second linearly polarized light outgoing; When the angle of the frictional direction of the exit facet substrate of twisted nematic liquid crystal box 51 was θ+90 °, first linearly polarized light that described twisted nematic liquid crystal box 51 provides display unit 41 was converted to the 3rd linearly polarized light outgoing.
In addition, the twisted nematic liquid crystal box 51 in the device shown in Figure 5 and the opposite face of twisted nematic liquid crystal box 43 can shared substrates, as shown in Figure 6: in close display unit 41 one sides, the angle of the substrate frictional direction of twisted nematic liquid crystal box 51 is α (shown in the dotted arrow on the twisted nematic liquid crystal box 51 among the figure), the angle of the frictional direction of the substrate that twisted nematic liquid crystal box 43 and twisted nematic liquid crystal box 51 are shared is θ (not shown among Fig. 6), and the angle of the substrate frictional direction of the exit facet of twisted nematic liquid crystal box 43 is θ+90 ° (shown in the solid arrows on the twisted nematic liquid crystal box 43 among Fig. 6).According to noted earlier, the angle of the frictional direction of the substrate that twisted nematic liquid crystal box 43 and twisted nematic liquid crystal box 51 are shared also can be taken as θ+90 °, and at this moment, the angle of the substrate frictional direction of the exit facet of twisted nematic liquid crystal box 43 should be taken as θ.
Figure 7 shows that another low scattering 2D-3D suitching type 3 d display device structural representation that the utility model embodiment provides, along optical path direction, this device comprises successively: display unit 41, twisted nematic liquid crystal box 71 and birefringence compound lens 44.Wherein, have the operation principle of the display unit 41 of same reference numerals and birefringence compound lens 44 and noted earlier consistent, be not described in detail in this with Fig. 4.
Described twisted nematic liquid crystal box 71, the polarization direction that is used for first linearly polarized light that rotating display device 41 provides: when not having applied voltage, described first linearly polarized light is rotated to be a kind of in second linearly polarized light and the 3rd linearly polarized light, and when applied voltage was predetermined voltage, twisted nematic liquid crystal box 71 rotated to be another kind in second linearly polarized light and the 3rd linearly polarized light with first linearly polarized light.For example among Fig. 7 shown in the arrow, the angle of the frictional direction of the plane of incidence substrate of twisted nematic liquid crystal box 71 is α, the angle of the frictional direction of exit facet substrate can be taken as θ+90 °, then when twisted nematic liquid crystal box 71 does not have applied voltage, twisted nematic liquid crystal box 71 is rotated into the 3rd linearly polarized light outgoing that polarization angle is θ+90 ° with described first linearly polarized light; When this twisted nematic liquid crystal box 71 applies predetermined voltage, twisted nematic liquid crystal box 71 rotates to be the second linearly polarized light outgoing that polarization angle is θ with described first linearly polarized light.
Arbitrary twisted nematic liquid crystal box described in Fig. 4 to Fig. 7 can also be embodied as the twisted nematic liquid crystal film, is arranged at respectively on the adjacent with it device, as described in being arranged on the plane of incidence of the exit facet of display unit 41 or birefringence compound lens 44.
Fig. 4 is to device shown in Figure 7, that the polarized light conversion device of various composition forms converts the emergent ray polarised light of display unit to is parallel/perpendicular to the linearly polarized light of the liquid crystal aligning of described birefringence compound lens, again because the liquid crystal aligning of birefringence compound lens is consistent with groove direction, therefore, this birefringence compound lens has single refractive index to the linearly polarized light of vertical incidence, can not make the linearly polarized light of incident produce scattering, improve the definition of 2D-3D suitching type 3 d display device.In addition, when this low scattering 2D-3D suitching type 3 d display device is in non-operating mode, because the polarized light conversion device between display unit and the birefringence compound lens can filter most surround lightings, so that it can't incide on the display unit of low scattering 2D-3D suitching type 3 d display device, therefore the surround lighting of scattering on display unit reduces, and has solved the problem that shutdown back display screen turns white in the prior art.
Above-mentioned embodiment only is schematic; rather than it is restrictive; those skilled in the art is under the enlightenment of this method; do not breaking away under the scope situation that this method aim and claim protect; can also make a lot of distortion, these all belong within the protection range of the present utility model.
Claims (8)
1. one kind low scattering 2D-3D suitching type 3 d display device, this device comprises: display unit, polarized light conversion device and birefringence compound lens; Described polarized light conversion device is arranged between described display unit and the described birefringence compound lens; Described birefringence compound lens comprises convex lens array and concavees lens array, the male and female face complementation of described convex lens array and described concavees lens array, and arbitrary group of parallel stripes in the two-dimensional structure light field of the groove direction of described concavees lens array and described display unit becomes a non-zero included angle, and one among described convex lens array and the described concavees lens array is liquid crystal material; It is characterized in that the liquid crystal aligning direction of described birefringence compound lens is parallel to the groove direction of described concavees lens array;
The plane picture light of described display unit outgoing is linearly polarized light;
Described polarized light conversion device, the linearly polarized light that is used to described display unit is provided carries out controllable rotation or directly transmission, provides two kinds of orthogonal linearly polarized lights in polarization direction with this to described birefringence compound lens; The polarization direction of a kind of linearly polarized light among described two kinds of orthogonal linearly polarized lights in polarization direction is parallel to the liquid crystal aligning direction of described birefringence compound lens;
Described birefringence compound lens, two kinds of orthogonal linearly polarized lights in polarization direction that described polarized light conversion device is provided show as convex lens and plano lens respectively.
2. a kind of low scattering 2D-3D suitching type 3 d display device as claimed in claim 1, it is characterized in that, the linearly polarized light of described display unit outgoing is not parallel to the liquid crystal aligning direction of described birefringence compound lens, and described polarized light conversion device comprises: the phase delay device and the first twisted nematic liquid crystal box;
Described phase delay device is used for the linearly polarized light that described display unit provides is rotated into a kind of of described two kinds of orthogonal linearly polarized lights in polarization direction;
The twist angle of the described first twisted nematic liquid crystal box is 90 degree, be used for when not having applied voltage, the linearly polarized light of described phase delay device outgoing is rotated to be the perpendicular linearly polarized light in polarization direction, or during greater than threshold voltage, make the direct transmission of linearly polarized light of incident at applied voltage.
3. a kind of low scattering 2D-3D suitching type 3 d display device as claimed in claim 2 is characterized in that described phase delay device is a half-wave plate.
4. a kind of low scattering 2D-3D suitching type 3 d display device as claimed in claim 3 is characterized in that described half-wave plate is birefringece crystal material or nematic liquid crystal material.
5. a kind of low scattering 2D-3D suitching type 3 d display device as claimed in claim 1, it is characterized in that, the linearly polarized light of described display unit outgoing is not parallel to the liquid crystal aligning direction of described birefringence compound lens, and described polarized light conversion device comprises: the second twisted nematic liquid crystal box and the 3rd twisted nematic liquid crystal box;
The described second twisted nematic liquid crystal box is used for the linearly polarized light that described display unit provides is rotated into a kind of of described two kinds of orthogonal linearly polarized lights in polarization direction;
The twist angle of described the 3rd twisted nematic liquid crystal box is 90 degree, be used for when not having applied voltage, the polarised light of the described second twisted nematic liquid crystal box outgoing is rotated to be the perpendicular linearly polarized light in polarization direction, or during greater than threshold voltage, make the direct transmission of linearly polarized light of incident at applied voltage.
6. a kind of low scattering 2D-3D suitching type 3 d display device as claimed in claim 1, it is characterized in that, the linearly polarized light of described display unit outgoing is not parallel to the liquid crystal aligning direction of described birefringence compound lens, described polarized light conversion device is the 4th twisted nematic liquid crystal box: be used for when not having applied voltage, the linearly polarized light that described display unit is provided rotates to be a kind of in described two kinds of orthogonal linearly polarized lights in polarization direction, or when applied voltage was predetermined voltage, the linearly polarized light that described display unit is provided rotated the another kind in described two kinds of orthogonal linearly polarized lights in polarization direction.
7. a kind of low scattering 2D-3D suitching type 3 d display device as claimed in claim 1, it is characterized in that, the linearly polarized light of described display unit outgoing is parallel to the liquid crystal aligning direction of described birefringence compound lens, described polarized light conversion device is that twist angle is the 5th a twisted nematic liquid crystal box of 90 degree, be used for when not having applied voltage, the linearly polarized light that described display unit is provided is rotated into the perpendicular linearly polarized light outgoing in polarization direction, and at applied voltage during greater than threshold voltage, the linearly polarized light that described display unit is provided directly is transmitted through described birefringence compound lens.
8. as each described a kind of low scattering 2D-3D suitching type 3 d display device of claim 1 to 7, it is characterized in that described display unit comprises: the plane picture light of outgoing is the polarizer on the display of nonlinear polarization light and the exit facet that is arranged at described display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820108181XU CN201199726Y (en) | 2008-05-30 | 2008-05-30 | Low-dispersion 2D-3D switching type stereo display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820108181XU CN201199726Y (en) | 2008-05-30 | 2008-05-30 | Low-dispersion 2D-3D switching type stereo display device |
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| CN201199726Y true CN201199726Y (en) | 2009-02-25 |
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| CNU200820108181XU Expired - Lifetime CN201199726Y (en) | 2008-05-30 | 2008-05-30 | Low-dispersion 2D-3D switching type stereo display device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101287144B (en) * | 2008-05-30 | 2010-06-23 | 深圳超多维光电子有限公司 | Stereo display device switching between 2D and 3D with low scattering |
| CN101806967A (en) * | 2010-04-30 | 2010-08-18 | 友达光电股份有限公司 | Adjustable fresnel lens |
| CN102608767A (en) * | 2012-03-16 | 2012-07-25 | 深圳超多维光电子有限公司 | Autostereoscopic display device and corresponding terminal equipment |
| CN102707450A (en) * | 2012-05-23 | 2012-10-03 | 京东方科技集团股份有限公司 | Display device and control method thereof |
| CN103167309A (en) * | 2011-12-15 | 2013-06-19 | 台达电子工业股份有限公司 | Naked eye stereoscopic display device |
| CN103185984A (en) * | 2011-12-29 | 2013-07-03 | 财团法人工业技术研究院 | Display device |
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2008
- 2008-05-30 CN CNU200820108181XU patent/CN201199726Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101287144B (en) * | 2008-05-30 | 2010-06-23 | 深圳超多维光电子有限公司 | Stereo display device switching between 2D and 3D with low scattering |
| CN101806967A (en) * | 2010-04-30 | 2010-08-18 | 友达光电股份有限公司 | Adjustable fresnel lens |
| CN103167309A (en) * | 2011-12-15 | 2013-06-19 | 台达电子工业股份有限公司 | Naked eye stereoscopic display device |
| CN103167309B (en) * | 2011-12-15 | 2015-04-01 | 台达电子工业股份有限公司 | Naked eye stereoscopic display device |
| CN103185984A (en) * | 2011-12-29 | 2013-07-03 | 财团法人工业技术研究院 | Display device |
| CN102608767A (en) * | 2012-03-16 | 2012-07-25 | 深圳超多维光电子有限公司 | Autostereoscopic display device and corresponding terminal equipment |
| CN102608767B (en) * | 2012-03-16 | 2014-11-26 | 深圳超多维光电子有限公司 | Autostereoscopic display device and corresponding terminal equipment |
| CN102707450A (en) * | 2012-05-23 | 2012-10-03 | 京东方科技集团股份有限公司 | Display device and control method thereof |
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