CN104238230A - Liquid crystal lens and stereoscopic display device - Google Patents
Liquid crystal lens and stereoscopic display device Download PDFInfo
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- CN104238230A CN104238230A CN201410443313.4A CN201410443313A CN104238230A CN 104238230 A CN104238230 A CN 104238230A CN 201410443313 A CN201410443313 A CN 201410443313A CN 104238230 A CN104238230 A CN 104238230A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 208
- 239000000758 substrate Substances 0.000 claims abstract description 96
- 230000005684 electric field Effects 0.000 claims abstract description 91
- 125000006850 spacer group Chemical group 0.000 claims abstract description 79
- 230000001154 acute effect Effects 0.000 claims abstract description 11
- 238000007598 dipping method Methods 0.000 claims description 16
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- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
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Abstract
The invention is applicable to the technical field of stereoscopic display and provides a stereoscopic display device. The stereoscopic display device comprises a display panel and a liquid crystal lens, wherein the liquid crystal lens comprises a first substrate and a second substrate which are oppositely arranged, a liquid crystal layer and spacers, a plurality of first electrodes which are arranged in parallel and at intervals are arranged on the first substrate, a plurality of second electrodes which are arranged in parallel and at intervals are arranged on the second substrate, and an included angle between the extending direction of the second electrodes and the orientation direction of the liquid crystal layer is an acute angle. The stereoscopic display device further comprises a voltage control module for controlling driving voltage between the first electrodes and the second electrodes. When the stereoscopic display device is in a 2D (2-dimensional) display state, the driving voltage produces a transverse electric field between the first substrate and the second substrate, the transverse electric field drives liquid crystal molecules in the liquid crystal layer to deflect to different extents, thus refractivity difference between the liquid crystal molecules and the spacers is reduced, the influence of the spacers on the light emergence of the display panel is eliminated and the display quality is improved.
Description
Technical field
The invention belongs to stereo display technique field, particularly relate to liquid crystal lens and 3 d display device.
Background technology
Along with the development of stereo display technique, people require that 3 d display device not only can show stereo-picture, also can show 2D image according to the demand of beholder, as display word or picture.As shown in Figure 1, existing 3 d display device, comprises display panel 2 ＇ and liquid crystal lens 1 ＇ being located at display panel 2 ＇ light emission side.Display panel 2 ＇ provides the left view and right view with image difference, by point light action of liquid crystal lens 1 ＇, make left view enter the left eye of beholder, right view enters the right eye of beholder, and the brain of beholder forms stereo-picture based on the image difference of institute's perception.
As shown in Figures 1 and 2, liquid crystal lens 1 ＇ comprises first substrate 11 ＇ and second substrate 12 ＇ that are oppositely arranged, liquid crystal layer and spacer 14 ＇ for supporting thickness of liquid crystal layer is provided with between first substrate 11 ＇ and second substrate 12 ＇, first substrate 11 ＇ is provided with multiple first electrode 15 ＇ be parallel to each other, all keep at a certain distance away between adjacent two the first electrode 15 ＇, second substrate 12 ＇ is provided with multiple second electrode 16 ＇ be parallel to each other, all keep at a certain distance away between adjacent two the second electrode 16 ＇, to the first electrode 15 ＇, second electrode 16 ＇ provides the first voltage and the second voltage respectively, then, pressure reduction between first voltage and the second voltage produces and drives electric field between first substrate 11 ＇ and second substrate 12 ＇, drive the liquid crystal molecule 13 ＇ generation deflection in various degree in electric field driven liquid crystal layer, thus in first substrate 11 ＇ and second substrate 12 ＇, form liquid crystal lens unit 17 ＇ of array arrangement, the polarized light of display panel 2 ＇ outgoing is by point light action of liquid crystal lens unit 17 ＇, left view is by left eye identification, right view is by right eye identification, thus carry out 3-D display.
As shown in Figure 3, when 3 d display device is used for 2D display, liquid crystal lens 1 ＇ is carried out power down process, now, produce without electric field between first substrate 11 ＇ and second substrate 12 ＇, the polarized light that display panel 2 ＇ sends is through spacer 14 ＇, because the refringence between spacer 14 ＇ and liquid crystal molecule 13 ＇ is larger, light reflects at spacer 14 ＇ place, cause human eye when watching 3 d display device, there is bright spot at spacer 14 ＇ place, affect viewing effect and the viewing comfort level of beholder.
Prior art discloses a kind of 3 d display device, comprise display panel and liquid crystal lens grating, display panel comprises multiple pixel cell and is arranged on the black matrix between multiple pixel cell, liquid crystal lens grating comprises spacer, the position of spacer corresponds to the position of black matrix in display panel, black matrix is set in display panel, not only affect the display effect of display panel, and black matrix fail complete coverage gap son, when causing human eye to be watched, still there is bright spot phenomenon at spacer place.
Summary of the invention
The object of embodiment of the present invention is to provide a kind of 3 d display device, is intended to solve above-mentioned one or more problem that prior art existence is limited to or defect causes.
Embodiment of the present invention realizes like this, 3 d display device, comprise display panel and the liquid crystal lens being located at described display panel light emission side, described liquid crystal lens comprises the first substrate and second substrate that are oppositely arranged, liquid crystal layer that alignment direction is horizontal direction and the spacer for supporting described thickness of liquid crystal layer is provided with between described first substrate and described second substrate, described first substrate is provided with and is parallel to each other and spaced multiple first electrode, described second substrate is provided with and is parallel to each other and spaced multiple second electrode, angle between the bearing of trend of described second electrode and the alignment direction of described liquid crystal layer is acute angle, described 3 d display device also comprises voltage control module, for controlling the driving voltage between described first electrode and described second electrode, when described 3 d display device is in 2D display, described driving voltage produces transverse electric field between described first substrate and described second substrate, described transverse electric field drives the liquid crystal molecule generation deflection in various degree in described liquid crystal layer, reduce the refringence between described liquid crystal molecule and described spacer, to eliminate the impact of described spacer on described display panel bright dipping.
Further, described driving voltage forms strong electric field region in the crossover location place of described first electrode and described second electrode, the described liquid crystal deflecting element angle being positioned at described strong electric field region is n1, and the deflection angle away from the described liquid crystal molecule of described strong electric field region is n
2, and n
1> n
2.
Particularly, the described liquid crystal molecule being positioned at described strong electric field region deflects along first direction, and described first direction is perpendicular to the bearing of trend of described second electrode.
Further, the spacing described in adjacent two between second electrode is greater than the width of described second electrode.
Preferably, the spacing described in adjacent two between second electrode is L, and the width of described second electrode is B, and L≤10B.
Preferably, the angle between the bearing of trend of described first electrode and the bearing of trend of described second electrode is α
1, described α
1for acute angle, the angle between the bearing of trend of described second electrode and the alignment direction of described liquid crystal layer is β
1, and 45 °≤β
1< 90 °.
Or preferably, the angle between the bearing of trend of described first electrode and the bearing of trend of described second electrode is α
2, described α
2for obtuse angle, the angle between the bearing of trend of described second electrode and the alignment direction of described liquid crystal layer is β
2, and 0 ° of < β
2< 45 °.
Particularly, described voltage control module controls the second voltage on the first voltage of putting on each described first electrode and each described second electrode, and the difference between described first voltage and described second voltage is described driving voltage.
Further, when described 3 d display device is in 2D display, described first voltage is common electric voltage, and described second voltage is alternating voltage, and described in described in adjacent two, the second electrode pair is answered two, second voltage carves equal and opposite in direction at the same time, and polarity is contrary.
Further, when described 3 d display device is in 3D display, described driving voltage produces and drives electric field between described first substrate and described second substrate, and liquid crystal deflecting element described in described driving electric field driven forms the liquid crystal lens unit that array is arranged.
Particularly, each described liquid crystal lens unit is to there being at least two described first electrodes, and described voltage control module controls the Central Symmetry of each described first voltage relative to described liquid crystal lens unit, and described second voltage is common electric voltage.
Further, described driving voltage is greater than the threshold voltage of described liquid crystal molecule.
The 3 d display device that embodiment of the present invention provides, employing voltage control module controls the driving voltage between the first electrode and the second electrode, when 3 d display device is in 2D display, driving voltage produces transverse electric field, under the effect of transverse electric field, there is deflection in various degree in liquid crystal molecule, thus, reduce the refringence between liquid crystal molecule and spacer, weaken spacer to the refraction of display panel bright dipping, eliminating human eye when watching 3 d display device, there is bright spot phenomenon at spacer place.Compared with prior art, in the present embodiment, the position of spacer does not need the position corresponding to black matrix in display panel, reduces the manufacture difficulty of liquid crystal lens.
Another object of embodiment of the present invention is to provide a kind of liquid crystal lens, comprise the first substrate and second substrate that are oppositely arranged, liquid crystal layer and the spacer for supporting described thickness of liquid crystal layer is provided with between described first substrate and described second substrate, the alignment direction of described liquid crystal layer is horizontal direction, described first substrate is provided with multiple first electrodes be parallel to each other, described second substrate is provided with and is parallel to each other and spaced multiple second electrode, angle between the bearing of trend of described second electrode and the alignment direction of described liquid crystal layer is acute angle, when applying driving voltage to each described first electrode and described second electrode, described driving voltage produces transverse electric field between described first substrate and described second substrate, described transverse electric field drives the liquid crystal molecule generation deflection in various degree in described liquid crystal layer, to reduce the refringence between described liquid crystal molecule and described spacer.
The liquid crystal lens that embodiment of the present invention provides, there is angle in the bearing of trend of the second electrode and the alignment direction of liquid crystal layer, and angle is acute angle, for eliminating the poor larger problem of spacer and crystal molecule refractive index, driving voltage is applied to the first electrode and the second electrode, driving voltage produces transverse electric field between first substrate and second substrate, under the effect of transverse electric field, there is deflection in various degree in the liquid crystal molecule in liquid crystal layer, reduce the refringence between liquid crystal molecule and spacer, compared to prior art, the desired location of spacer does not need corresponding with the black matrix on display panel, reduce the manufacture difficulty of liquid crystal lens.
Accompanying drawing explanation
Fig. 1 is the structural representation of the 3 d display device that prior art provides;
Fig. 2 is the structural representation of the liquid crystal lens in Fig. 1;
Fig. 3 is another structural representation of the liquid crystal lens in Fig. 1;
Fig. 4 is the structural representation of the 3 d display device that embodiment of the present invention one provides;
Fig. 5 is the structural representation of the liquid crystal lens that Fig. 4 provides;
Fig. 6 is the distribution schematic diagram of the liquid crystal layer in Fig. 5;
Fig. 7 is the angle schematic diagram that Fig. 5 provides the alignment direction of liquid crystal layer in liquid crystal lens and the bearing of trend of the second electrode;
Fig. 8 is another structural representation of the liquid crystal lens that Fig. 4 provides;
Fig. 9 is the angle schematic diagram of the bearing of trend of liquid crystal alignment layer direction and the second electrode in the liquid crystal lens that provides of embodiment of the present invention two.
Embodiment
In order to make the technical problem to be solved in the present invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and the embodiments, the present invention is further elaborated.Should be appreciated that embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment one
As shown in Figures 4 to 6, the 3 d display device that embodiment of the present invention provides, this 3 d display device can carry out 2D and 3D display, and 3 d display device comprises liquid crystal lens 1b and display panel 2b, and liquid crystal lens 1b is arranged at the light emission side of display panel 2b.Liquid crystal lens 1b comprises the first substrate 11b and second substrate 12b that are oppositely arranged, second substrate 12b is arranged at the top of first substrate 11b, be provided with liquid crystal layer 10b and spacer 14b between first substrate 11b and second substrate 12b, spacer 14b is for supporting the thickness of liquid crystal layer 10b.Wherein, the alignment direction of liquid crystal layer 10b is horizontal direction, and the horizontal direction herein mentioned is the direction vector perpendicular to terrestrial gravitation direction.First substrate 11b is provided with multiple first electrode 15b, and the bearing of trend of each first electrode 15b is consistent, and is namely parallel to each other between each first electrode 15b, all keeps at a certain distance away between adjacent two the first electrode 15b.Second substrate 12b is provided with multiple second electrode 16b, and the bearing of trend of each second electrode 16b is consistent, and is namely parallel to each other between each second electrode 16b, all keeps at a certain distance away between adjacent two the second electrode 16b.Angle between the bearing of trend of the second electrode 16b and the alignment direction of liquid crystal layer 10b is acute angle.
As shown in figs. 5 and 6,3 d display device also comprises voltage control module (not shown), voltage control module is for controlling the driving voltage between the first electrode 15b, the second electrode 16b, when 3 d display device is used for 2D display, driving voltage produces transverse electric field between first substrate 11b and second substrate 12b, and transverse electric field drives the liquid crystal molecule 13b generation deflection in various degree in liquid crystal layer 10b.Particularly, first substrate 11b is provided with multiple first electrode 15b, second substrate 12b is provided with multiple second electrode 16b, in phase, polarity is applied in the same time to adjacent two the second electrode 16b contrary, equal-sized alternating voltage, common electric voltage is applied to each first electrode 15b, between adjacent two the second electrode 16b, produces transverse electric field.The electric field intensity of the transverse electric field sensed due to the liquid crystal molecule 13b be positioned near first substrate 11b, second substrate 12b is more weak, and the both alignment layers (not shown) that is subject to liquid crystal lens 1b of liquid crystal molecule 13b herein provides the effect of orientation power, therefore, the deflection angle of liquid crystal molecule 13b is herein less, and the electric field intensity being positioned at transverse electric field is larger compared with the liquid crystal molecule 13b deflection angle of strength.It can thus be appreciated that under the effect of transverse electric field, there is deflection in various degree in liquid crystal molecule 13b.The light that display panel 2b sends is through liquid crystal lens 1b, be subject to the impact of the liquid crystal molecule 13b of different deflection angle, reduce the refringence between liquid crystal molecule 13b and spacer 14b, namely the refringence between liquid crystal molecule 13b and spacer 14b, in preset range, weakens the impact that refraction occurs at spacer 14b place in display panel 2b bright dipping.Promote the viewing effect of 3 d display device under 2D display state and viewing comfort level, improve display resolution.The present invention can solve 3 d display device as shown in Figure 3, when beholder is when watching the 2D picture that 3 d display device presents, to the power down process that liquid crystal lens 1 ＇ carries out, causing the refringence between liquid crystal molecule 13 ＇ and spacer 14 ＇ comparatively large, there is the problem of refraction effect in the light that display panel 2 ＇ sends at spacer 14 ＇ place.
The preset range that present embodiment provides refers to that the refringence between liquid crystal molecule 13b and spacer 14b is less than 0.1.
As shown in Fig. 5 and Fig. 7, for ensureing the imaging effect of 3 d display device when 3D shows, between the bearing of trend of the first electrode 15b and the bearing of trend of the second electrode 16b, there is angle.Driving voltage produces transverse electric field between first substrate 11b and second substrate 12b, by this type of drive, the crossover location place of the first electrode 15b and the second electrode 16b produces stronger transverse electric field, liquid crystal molecule 13b near crossover location is under the effect of electric field force, the electric field line directional spreding of transverse electric field can be tending towards, in the present embodiment, electric field line direction is perpendicular to the bearing of trend of the second electrode 16b.And more weak away from the transverse electric field electric field intensity at crossover location place, liquid crystal molecule 13b is herein subject to more weak electric field force effect, and deflection angle is less.Therefore, the light that display panel 2b sends is through liquid crystal lens 1b, and light is subject to the impact of the liquid crystal molecule 13b of different degree of deflection, reduces spacer 14b and goes out the impact of anaclasis on display to display panel 2b, promote the display quality of 3 d display device.
In the present embodiment, the position of spacer 14b does not need the position corresponding to black matrix in display panel 2b, reduces the manufacture difficulty of liquid crystal lens 1b.
As shown in Figure 4, driving voltage forms strong electric field region in the crossover location place of the first electrode 15b and the second electrode 16b, and the liquid crystal molecule 13b deflection angle being positioned at strong electric field region is n
1, the deflection angle away from the liquid crystal molecule 13b of strong electric field region is n
2, and n
1> n
2.For ensureing that 3 d display device is when 3D shows, point light action of liquid crystal lens 1b, the bearing of trend of the first electrode 15b is crossing with the bearing of trend of the second electrode 16b, forms intersection region.Therefore, driving voltage produces the larger strong electric field region of electric field intensity at crossover location place.Liquid crystal molecule 13b near strong electric field region, can tend to the directional spreding of electric field line under the effect of electric field force, and namely the degree of deflection of liquid crystal molecule 13b is larger.And away from strong electric field region liquid crystal molecule 13b due to the electric field force sensed more weak, deflection angle is less, liquid crystal molecule 13b simultaneously near first substrate 11b, second substrate 12b both alignment layers is subject to the effect of orientation power, further the deflection angle of restriction liquid crystal molecule 13b.Therefore, under the effect of transverse electric field force, there is deflection in various degree in the liquid crystal molecule 13b in liquid crystal layer 10b, reduces the refringence of liquid crystal molecule 13b and spacer 14b.The light that display panel 2b sends enters liquid crystal lens 1b, is subject to the impact of the liquid crystal molecule 13b of different deflection angle, weakens the impact of spacer 14b on display panel 2b bright dipping, promotes the display effect of 3 d display device when 2D shows.
As the further improvement of above-mentioned embodiment, as shown in Figure 5, the liquid crystal molecule 13b being positioned at strong electric field region deflects along first direction, and first direction is perpendicular to the bearing of trend of the second electrode 16b.Under the effect of transverse electric field, there is deflection in various degree in the liquid crystal molecule 13b in liquid crystal layer 10b, make refringence between liquid crystal molecule 13b and spacer 14b in preset range, the bright dipping of display panel 2b enters in liquid crystal lens 1b, weaken spacer 14b goes out anaclasis impact on display panel 2b, and the liquid crystal molecule 13b of different degree of deflection also can spread by refract light further, weaken spacer 14b further to the impact of display effect.Promote the viewing effect of 3 d display device under 2D display state and viewing comfort level, improve display resolution.As shown in Figure 3, the 3 d display device that prior art provides, when showing for 2D, usually power down process is carried out to liquid crystal lens 1 ＇, refringence now between liquid crystal molecule 13 ＇ and spacer 14 ＇ is larger, causing the bright dipping of display panel 2 ＇ to reflect at spacer 14 ＇ place, there is bright spot phenomenon at spacer 14 ＇ place in human eye viewing 3 d display device.The 3 d display device that present embodiment provides compared with prior art, improves the viewing effect of 3 d display device under 2D display state and viewing comfort level.
As the further improvement of above-mentioned embodiment, as shown in Figures 6 and 7, the angle between the bearing of trend of the first electrode 15b and the bearing of trend of the second electrode 16b is α
1, α in the present embodiment
1for acute angle, the angle between the bearing of trend of the second electrode 16b and the alignment direction of liquid crystal layer 10b is β
1, and 45 °≤β
1< 90 °.Work as β
1=45 °, the angle angle namely between the bearing of trend of the second electrode 16b and the alignment direction of liquid crystal layer 10b is 45 °.Under the effect of transverse electric field, there is deflection in various degree in the liquid crystal molecule 13b in liquid crystal layer 10b, reduce the refringence between liquid crystal molecule 13b and spacer 14b, weaken spacer 14b to the refraction of display panel 2b bright dipping, improve the impact of spacer 14b on display effect, promote the viewing effect of 3 d display device under 2D display state and viewing comfort level.Or, work as β
1=60 °, the angle angle namely between the bearing of trend of the second electrode 16b and the alignment direction of liquid crystal layer 10b is 60 °.Under the effect of transverse electric field, there is deflection in various degree in the liquid crystal molecule 13b in liquid crystal layer 10b, reduce the refringence between liquid crystal molecule 13b and spacer 14b, weaken spacer 14b to the refraction of display panel 2b bright dipping, improve the impact of spacer 14b on display effect, promote the viewing effect of 3 d display device under 2D display state and viewing comfort level.Angle α between the bearing of trend of the first electrode 15b and the bearing of trend of the second electrode 16b
1, the impact eliminating the moire fringes effect produced when it superposes mutually should be considered, improve display effect.
In the present embodiment, the alignment direction of liquid crystal layer 10b is horizontal direction, voltage control module controls each first electrode 15b and provides the first voltage, the second voltage is provided to the second electrode 16b, difference between first voltage and the second voltage is driving voltage, and driving voltage forms transverse electric field between first substrate 11b and second substrate 12b.Because the bearing of trend of the second electrode 16b and the alignment direction angle of liquid crystal layer 10b are β
1therefore, under the effect of transverse electric field, there is deflection in various degree in the liquid crystal molecule 13b in liquid crystal layer 10b, reduce the refringence between liquid crystal molecule 13b and spacer 14b, weaken spacer 14b to the refraction of display panel 2b bright dipping, improve the impact of spacer 14b on display effect, promote the viewing effect of 3 d display device under 2D display state and viewing comfort level.
As the further improvement of above-mentioned embodiment, as shown in figs. 5 and 6, the spacing between adjacent two the second electrode 16b is greater than the width of the second electrode 16b, is convenient to form transverse electric field, liquid crystal molecule 13b is under the effect of transverse electric field, and different deflection angles is more obvious.Therefore, advantageously in the refringence reducing liquid crystal molecule 13b and spacer 14b, improve the impact of spacer 14b on display panel 2b bright dipping, improve display effect.
Preferably, as shown in Figure 6, the spacing between adjacent two the second electrode 16b is L, and the width of the second electrode 16b is B, and L≤10B.Due to the electric field intensity of enough transverse electric field will be maintained, therefore, the spacing between adjacent two the second electrode 16b should not 10 times of super many second electrode 16b width.Ensure under the effect of transverse electric field, there is wide-angle deflection in the liquid crystal molecule 13b being positioned at strong electric field region, is of value to the refringence reduced between liquid crystal molecule 13b and spacer 14b, improves the display effect of 3 d display device when 2D shows.
As the further improvement of above-mentioned embodiment, as shown in Figure 4, when 3 d display device is in 2D display, first voltage is common electric voltage, second voltage is alternating voltage, and two the second voltages corresponding to adjacent two the second electrode 16b carve equal and opposite in direction at the same time, and polarity is contrary.Namely voltage control module applies common electric voltage to the first electrode 15b, alternating voltage is applied to the second electrode 16b, difference between first voltage and the second voltage is driving voltage, driving voltage produces strong electric field region at the crossover location place of the first electrode 15b and the second electrode 16b, the liquid crystal molecule 13b deflection angle being positioned at strong electric field region is larger, away from strong electric field region, the liquid crystal molecule 13b deflection angle as being positioned near first substrate 11b, second substrate 12b is less.Therefore, liquid crystal layer 10b has different refractivity, upsets the refract light of spacer 14b, eliminates and occurs bright spot phenomenon at spacer 14b place, promotes the display effect of 3 d display device when 2D shows.
As the further improvement of above-described embodiment, as shown in figs. 4 and 5, the 3 d display device that the embodiment of the present invention provides, driving voltage is greater than the threshold voltage v of liquid crystal molecule 13b
th.Driving voltage produces transverse electric field, liquid crystal molecule 13b deflects under the effect of transverse electric field, reduce the refringence between liquid crystal molecule 13b and spacer 14b, therefore, the light that display panel 2b sends is reflecting through spacer 14b, liquid crystal molecule 13b birefringence light spreads further, when the 3 d display device that eliminating prior art provides shows state for 2D, power down process is adopted to liquid crystal lens 1b, cause the refringence of liquid crystal molecule 13b and spacer 14b larger, the refraction of light is there is in light through spacer 14b, when causing human eye to watch 3 d display device, the problem of bright spot is there is at spacer 14b place.
As shown in Figure 8, when 3 d display device is in 3D display, the voltage control module that the present embodiment provides controls the driving electric field that driving voltage generation electric field intensity does not wait, under the effect driving electric field, liquid crystal molecule 13a deflects with the change of electric field intensity, make the refractive index distribution gradient of liquid crystal layer 10a between first substrate 11a and second substrate 12a, form the liquid crystal lens unit L1 arranged in array.
Particularly, each liquid crystal lens unit is to there being at least three the first electrode 15a, and voltage control module controls the Central Symmetry of each first voltage relative to liquid crystal lens unit L1, and the second voltage is common electric voltage.The 3 d display device that the embodiment of the present invention provides, when showing for 3D, voltage control module controls the first voltage on each first electrode 15a, and second the second voltage on electrode 16a, guarantee the left view with image difference that display panel 2a provides by liquid crystal lens 1a, right view presents to beholder, 3D display effect can not be affected.
As shown in Figure 4, another object of embodiment of the present invention is to provide a kind of liquid crystal lens 1b, comprise the first substrate 11b and second substrate 12b that are oppositely arranged, liquid crystal layer 10b and the spacer 14b for supporting liquid crystal layer 10b thickness is provided with between first substrate 11b and second substrate 12b, the alignment direction of liquid crystal layer 10b is horizontal direction, first substrate 11b is provided with the multiple first electrode 15b be parallel to each other, second substrate 12b is provided with and is parallel to each other and spaced multiple second electrode 16b, angle between the bearing of trend of the second electrode 16b and the alignment direction of liquid crystal layer 10b is acute angle, when applying driving voltage to each first electrode 15b and the second electrode 16b, driving voltage produces transverse electric field between first substrate 11b and second substrate 12b, transverse electric field drives the liquid crystal molecule 13b generation deflection in various degree in liquid crystal layer 10b, to reduce the refringence between liquid crystal molecule 13b and spacer 14b.
As shown in Fig. 4 and Fig. 6, liquid crystal lens 2b can as light-splitting device, for in 3 d display device, when 3 d display device is used for 2D display, usually power down process is carried out to liquid crystal lens 1b, the bright dipping of display panel 2b is caused to reflect at spacer 14b place, affect the display effect of 3 d display device, the liquid crystal lens 1b that present embodiment provides, to the driving voltage that the first electrode 15b and the second electrode 16b applies, driving voltage produces transverse electric field between first substrate 11b and second substrate 12b, under the effect of transverse electric field, there is deflection in various degree in the liquid crystal molecule 13b in liquid crystal layer 10b, thus the refringence reduced between liquid crystal molecule 13b and spacer 14b, eliminate spacer 14b to the impact of display panel 2b bright dipping, promote the display effect of 3 d display device.Compared to prior art, the desired location of spacer 14b does not need corresponding with the black matrix on display panel 2b, reduces the manufacture difficulty of liquid crystal lens 1b.
Particularly, first substrate 11b is provided with multiple first electrode 15b, second substrate 12b is provided with multiple second electrode 16b, in phase, polarity is applied in the same time to adjacent two the second electrode 16b contrary, equal-sized alternating voltage, common electric voltage is applied to each first electrode 15b, between adjacent two the second electrode 16b, produces transverse electric field.The electric field intensity of the transverse electric field sensed due to the liquid crystal molecule 13b be positioned near first substrate 11b, second substrate 12b is more weak, and the both alignment layers (not shown) that is subject to liquid crystal lens 1b of liquid crystal molecule 13b herein provides the effect of orientation power, therefore, the deflection angle of liquid crystal molecule 13b is herein less, and the electric field intensity being positioned at transverse electric field is larger compared with the liquid crystal molecule 13b deflection angle of strength.It can thus be appreciated that under the effect of transverse electric field, there is deflection in various degree in liquid crystal molecule 13b.The light that display panel 2b sends, through liquid crystal lens 1b, is subject to the impact of the liquid crystal molecule 13b of different deflection angle, reduces the refringence between liquid crystal molecule 13b and spacer 14b, weakens the impact that refraction occurs at spacer 14b place in display panel 2b bright dipping.Promote the viewing effect of 3 d display device under 2D display state and viewing comfort level, improve display resolution.
Embodiment two
As shown in Fig. 4 and Fig. 8, the 3 d display device that present embodiment provides and embodiment one provide the structure of 3 d display device substantially identical, and difference is, the angle between the bearing of trend of the first electrode 15c and the bearing of trend of the second electrode 16c is α
2, α in the present embodiment
2for obtuse angle, the angle between the bearing of trend of the second electrode 16c and the alignment direction of liquid crystal layer 10b is β
2, and 0 ° of < β
2< 45 °.Angle α between the bearing of trend of the first electrode 15b and the bearing of trend of the second electrode 16b
2, the impact eliminating the moire fringes effect produced when it superposes mutually should be considered, improve display effect.
Present embodiment provides β
2=30 °, namely the angle angle between the bearing of trend of the second electrode 16b and the alignment direction of liquid crystal layer 10b is 30 °, as shown in Figure 6, under the effect of transverse electric field, there is deflection in various degree in the liquid crystal molecule 13b in liquid crystal layer 10b, reduce the refringence between liquid crystal molecule 13b and spacer 14b, weaken spacer 14b to the refraction of display panel 2b bright dipping, improve the impact of spacer 14b on display effect, promote the viewing effect of 3 d display device under 2D display state and viewing comfort level.
As shown in Fig. 4, Fig. 6 and Fig. 8, the alignment direction of liquid crystal layer 10b is horizontal direction, and voltage control module controls the driving voltage between the first electrode 11b and the second electrode 12b, and driving voltage forms transverse electric field between first substrate 11b and second substrate 12b.Because the bearing of trend of the second electrode 16c and the alignment direction angle of liquid crystal layer 10b are β
2therefore, under the effect of transverse electric field, there is deflection in various degree in the liquid crystal molecule 13b in liquid crystal layer 10b, reduce the refringence between liquid crystal molecule 13b and spacer 14b, weaken spacer 14b to the refraction of display panel 2b bright dipping, improve the impact of spacer 14b on display effect, promote the viewing effect of 3 d display device under 2D display state and viewing comfort level.
The foregoing is only better embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. 3 d display device, comprise display panel and the liquid crystal lens being located at described display panel light emission side, described liquid crystal lens comprises the first substrate and second substrate that are oppositely arranged, liquid crystal layer that alignment direction is horizontal direction and the spacer for supporting described thickness of liquid crystal layer is provided with between described first substrate and described second substrate, described first substrate is provided with and is parallel to each other and spaced multiple first electrode, described second substrate is provided with and is parallel to each other and spaced multiple second electrode, it is characterized in that: the angle between the bearing of trend of described second electrode and the alignment direction of described liquid crystal layer is acute angle, described 3 d display device also comprises voltage control module, for controlling the driving voltage between described first electrode and described second electrode, when described 3 d display device is in 2D display, described driving voltage produces transverse electric field between described first substrate and described second substrate, described transverse electric field drives the liquid crystal molecule generation deflection in various degree in described liquid crystal layer, reduce the refringence between described liquid crystal molecule and described spacer, to eliminate the impact of described spacer on described display panel bright dipping.
2. 3 d display device as claimed in claim 1, it is characterized in that: described driving voltage forms strong electric field region in the crossover location place of described first electrode and described second electrode, the described liquid crystal deflecting element angle being positioned at described strong electric field region is n
1, the deflection angle away from the described liquid crystal molecule of described strong electric field region is n
2, and n
1> n
2.
3. 3 d display device as claimed in claim 2, it is characterized in that: the described liquid crystal molecule being positioned at described strong electric field region deflects along first direction, described first direction is perpendicular to the bearing of trend of described second electrode.
4. 3 d display device as claimed any one in claims 1 to 3, is characterized in that: the spacing described in adjacent two between second electrode is greater than the width of described second electrode.
5. 3 d display device as claimed in claim 4, it is characterized in that: the spacing described in adjacent two between second electrode is L, the width of described second electrode is B, and L≤10B.
6. 3 d display device as claimed in claim 5, is characterized in that: the angle between the bearing of trend of described first electrode and the bearing of trend of described second electrode is α
1, described α
1for acute angle, the angle between the bearing of trend of described second electrode and the alignment direction of described liquid crystal layer is β
1, and 45 °≤β
1< 90 °.
7. 3 d display device as claimed in claim 5, is characterized in that: the angle between the bearing of trend of described first electrode and the bearing of trend of described second electrode is α
2, described α
2for obtuse angle, the angle between the bearing of trend of described second electrode and the alignment direction of described liquid crystal layer is β
2, and 0 ° of < β
2< 45 °.
8. 3 d display device as claimed in claims 6 or 7, it is characterized in that: described voltage control module controls the second voltage on the first voltage of putting on each described first electrode and each described second electrode, and the difference between described first voltage and described second voltage is described driving voltage.
9. 3 d display device as claimed in claim 8, it is characterized in that: when described 3 d display device is in 2D display, described first voltage is common electric voltage, described second voltage is alternating voltage, and second voltage carves equal and opposite in direction at the same time described in described in adjacent two, the second electrode pair is answered two, polarity is contrary.
10. 3 d display device as claimed in claim 8, it is characterized in that: when described 3 d display device is in 3D display, described driving voltage produces and drives electric field between described first substrate and described second substrate, and liquid crystal deflecting element described in described driving electric field driven forms the liquid crystal lens unit that array is arranged.
11. 3 d display devices as claimed in claim 10, it is characterized in that: each described liquid crystal lens unit is to there being at least two described first electrodes, described voltage control module controls the Central Symmetry of each described first voltage relative to described liquid crystal lens unit, and described second voltage is common electric voltage.
12. 3 d display devices as claimed in claim 8, is characterized in that: described driving voltage is greater than the threshold voltage of described liquid crystal molecule.
13. liquid crystal lens, comprise the first substrate and second substrate that are oppositely arranged, liquid crystal layer and the spacer for supporting described thickness of liquid crystal layer is provided with between described first substrate and described second substrate, the alignment direction of described liquid crystal layer is horizontal direction, described first substrate is provided with multiple first electrodes be parallel to each other, described second substrate is provided with and is parallel to each other and spaced multiple second electrode, it is characterized in that: the angle between the bearing of trend of described second electrode and the alignment direction of described liquid crystal layer is acute angle, when applying driving voltage to each described first electrode and described second electrode, described driving voltage produces transverse electric field between described first substrate and described second substrate, described transverse electric field drives the liquid crystal molecule generation deflection in various degree in described liquid crystal layer, to reduce the refringence between described liquid crystal molecule and described spacer.
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| CN201410443313.4A CN104238230B (en) | 2014-09-02 | 2014-09-02 | Liquid crystal lens and stereoscopic display device |
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| CN201410443313.4A CN104238230B (en) | 2014-09-02 | 2014-09-02 | Liquid crystal lens and stereoscopic display device |
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| CN104238230B (en) | 2020-06-23 |
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