CN101329450B - Display device capable of switching from 2D to 3D - Google Patents
Display device capable of switching from 2D to 3D Download PDFInfo
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- CN101329450B CN101329450B CN2008101170860A CN200810117086A CN101329450B CN 101329450 B CN101329450 B CN 101329450B CN 2008101170860 A CN2008101170860 A CN 2008101170860A CN 200810117086 A CN200810117086 A CN 200810117086A CN 101329450 B CN101329450 B CN 101329450B
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Abstract
The invention discloses a 2D/3D switchable display device which comprises a three-dimensional display device which can realize the 2D/3D switch and the display by transforming polarization direction of polarized light, the 2D/3D switchable display device further comprises an electric control TN panel and a polarizing plate which are serially arranged, light emitted by the three-dimensional display device sequentially passes through the electric control TN panel and the polarizing plate, wherein, the vibration transmission direction of the polarizing plate is parallel to the polarization direction of one of the polarized light which is emitted by the three-dimensional display device. The proposal can reduce the incident environmental light intensity by one half, thereby reducing the color deviation degree caused by the environmental light. The display brightness can not be greatly affected regardless of the 2D state or the 3D state after the adjustment of the TN panel; furthermore, the polarization selection capacity of the polarizing plate can filter the external UV light which has great damage on liquid crystal or other polymer materials by one half, thereby effectively prolonging the service life of the liquid crystal or other polymer materials of the display device.
Description
Technical field
The present invention relates to a kind of 2D/3D display device capable of switching, relate in particular to a kind of 2D/3D display device capable of switching that utilizes the polarizing filter device to be reduced in color distortion under the surround lighting.
Background technology
Exist the various different light paths principles of utilizing to realize plane and three-dimensional switchable stereo display technique in the prior art, Figure 1 shows that wherein a kind of 2D/3D switchable stereo display device, comprise, provide two dimensional image display panel 10, be used for optionally will not rotating or revolve the polarized light conversion device that turn 90 degrees by the polarization of light direction that display panel 10 provides, and, be used for being divided into eye image and left-eye image at the described image that provides of 2D pattern transmission, image with incident in the 3D pattern by the lens subassembly that single refraction rate lens and refraction of birefringence lens constitute.Described polarized light conversion device comprises thin-film transistor circuit 11c, and (distance between display panel 10 and the thin-film transistor circuit 11c just schematically, mainly be to mark) for polarization direction light, as the drive electrode ito glass 11a of (being equivalent to the show electrode in the existing TFT display), ito glass 11b as public electrode, oriented layer 12a, 12b, nematic liquid crystal 13 and control module 20, wherein the ito glass 11a as drive electrode is made of a plurality of ITO unit that are not electrically connected mutually, each transistor among the thin-film transistor circuit 11c is electrically connected with described ITO unit respectively, control module 20 is electrically connected with thin-film transistor circuit 11c and ito glass 11b, be used for controlling voltage between each ITO unit and the ito glass 11b, two oriented layer 12a by thin film transistor (TFT), the molecular orientation of 12b is vertical mutually.When the emergent light of display panel 10 need be put a slice polaroid for the nonlinear polarization light time between display panel and polarized light conversion device, making the light that is incident on polarized light conversion device is linearly polarized photon, and oriented layer 12a surface liquid crystal molecular orientation is not identical when having electric field between the polarization direction of this linearly polarized photon and ITO unit and the ito glass 11b (public electrode).Lens subassembly comprises single refraction rate convex lens 14, birefraction concavees lens 15 and glass substrate 16.Convex lens among the present invention or concavees lens constitute by a plurality of lenticules in fact, also can be referred to as lens arra.The refractive index of single refraction rate convex lens 14 is n in this programme
1, birefraction concavees lens 15 have ordinary refraction index n
oWith the extraordinary ray refractive index n
e, and n
1=n
o, n
o＞n
eWherein the single refraction lens material can be high molecular polymer or other rigid transparent materials, the material of refraction of birefringence lens can be selected the negativity nematic liquid crystal, can fill to enter in the space that is made of single refraction rate lens 14 and glass sheet 16 under liquid state.Apply oriented layer 12c on glass substrate 16 surfaces, for example apply alignment agent and also make the liquid crystal arrangement direction identical with the polarization direction of the polarized light of display device outgoing through orientation process to liquid crystal on single refraction convex lens 14 surfaces.
Certainly, polarized light conversion device described in the prior art can also not comprise thin-film transistor circuit, adopts simple transparency electrode and power supply to control the conversion that whole polarized light conversion device carries out polarized light.
Describing the light path principle of the prior art below according to Fig. 1, is respectively the index paths of four road light by apparatus of the present invention among the figure, wherein goes up twice light and reflects at last, and the direct transmission of following twice light specifies their principle below.
As can be seen from Figure 1, because need carry out 3D to last twice light shows, control module 20 is charged to pairing two the ITO unit of last twice light by thin film transistor (TFT), make and produce electric field between this ITO unit and the ito glass 11b as public electrode, cause at the whole para-electric field directions of the liquid crystal molecule of this electric field region and arrange, when polarized light passes through, can not change the polarization direction, then pass convex lens 14 and incide concavees lens 15, this moment, the polarization direction of light was parallel with the liquid crystal arrangement direction of concavees lens 15, so concavees lens 15 are n for this ray refraction rate
e, because the refractive index n of single refraction rate convex lens 14
1Greater than n
e, promptly this moment, single refraction rate convex lens 14 refractive index was greater than the refractive index of the formed concavees lens 15 of birefraction liquid crystal, so the optical effect of compound lens is convex lens, and light can reflect through out-of-date.In this case, this 3 d display device can be presented at twice light respectively the left eye and the right eye of human eye, and what make that human eye sees is the 3D stereo-picture, and promptly 3 d display device will be gone up twice light and adopt the 3D mode to show.
The light path principle of twice light is described below down: control module 20 does not have to descend the charging of the pairing ITO of twice light unit (in actual applications, if previous time period is recharged on this ITO unit, this process in this programme, control module 20 can be discharged this ITO unit, be exactly to make not have electric field between this ITO unit and the ito glass 11b in a word as public electrode, the mode of control can be adjusted flexibly), the polarization direction of polarized light of inciding polarized light conversion device is identical with the direction of orientation on oriented layer 12a surface, light is by behind inside TN type (twisted nematic) liquid crystal of polarized light conversion device, be rotated by 90 degrees, the polarization direction of polarization direction during with incident is vertical, this light is from the planar section vertical incidence of single refraction rate convex lens 14, inject to birefraction concavees lens 15 from convex portions, this moment, the polarization direction was vertical with the Liquid Crystal Molecules Alignment direction of concavees lens 15, so concavees lens 15 are n with respect to this polarized light refractive index
o, because the refractive index n of single refraction convex lens 14
1Equal n
o, promptly this moment, single refraction rate convex lens 14 refractive index was identical with the refractive index of concavees lens 15, so this polarized light does not reflect the light straight-line pass at the interface at convex lens 14 and concavees lens 15.In this case, this 3 d display device adopts the 2D mode to show described twice light down.We can be referred to as the 2D/3D switching device to the structure outside the two-dimentional display panel 10.
The lens subassembly that adopts in above-mentioned existing scheme is made of single refraction rate lens and refraction of birefringence lens, and existing this refraction of birefringence lens normally will be orientated liquid crystal polymer material that (also claiming orientation) be provided with and be cured and form, the anisotropy that the monomer whose liquid crystal molecule itself has makes that after its polymerizing curable, inside has kept certain unevenness.This unevenness has caused the incident scattering of light.Incident light had both comprised from the picture signal light of screen outgoing, had also comprised the naturally light from extraneous incident.The yardstick of the unevenness of liquid crystalline polymer layer has comprised liquid crystal molecule monomer yardstick, its polymer macromolecule yardstick, and the yardstick of a plurality of varying number levels such as yardstick on liquid crystal molecule monomer orientation farmland, so it has also just comprised multiple situations such as diffraction, reflection and refraction to the incident scattering of light.Thickness with liquid crystalline polymer layer increases, and this non-uniform areas increases, and scattering strength also just increases.When thickness of liquid crystal layer arrived to a certain degree greatly, scattered intensity also can be very big.Very weak when picture signal light, even when not having the outgoing of picture signal light, the scattered light intensity of surround lighting can cause tangible visually-perceptible, so surround lighting can cause the comparatively serious distortion of image.Referring to the scattering light path of the surround lighting shown in Fig. 2 on liquid crystal, when surround lighting 20 incided in the birefringent material that this liquid crystal constitutes, scattering phenomenon can take place, be the light of scattering as light among the figure 21,22 and 23.
The harmful effect that the environment scattering of light that also has employing absorbability antireflection film to reduce incident in the prior art causes.But this method is a cost with victim signal light outgoing intensity.In the said lens assembly, the thickness of liquid crystal layer is bigger, reach hundreds of microns, the orientation of liquid crystal is difficult to control finely, thereby has sizable internal nonuniformity, causes serious scattering, so want to eliminate the dysgenic words of scattered light to display effect with the method for additional absorption antireflection film, just need to increase the absorption of film, so just reduced simultaneously signal light intensity, just display brightness more.In some cases, the reduction of the display brightness that it caused or even unacceptable.This also is the defective that can't overcome of this type of scheme.
On the other hand, owing to include the unevenness of liquid crystal molecule monomer yardstick in the switching device, the scattering on this yardstick meets Rayleigh's law of scattering, this means in general, and the shortwave scattering will be greater than the long wave scattering.Because the light transmittance curve of absorbability antireflection film is difficult for designing very smoothly, the image light that causes display to send is absorbed and the degree difference that weakens, therefore can make to show that colour cast appears in tone.
Summary of the invention
The 2D/3D display device capable of switching that the object of the present invention is to provide a kind of image color distortion significantly to reduce.
For realizing purpose of the present invention, the invention provides a kind of 2D/3D display device capable of switching, comprise by the polarization direction that utilizes the conversion polarized light and realize that 2D/3D switches the 3 d display device that shows, what comprise also that order places can automatically controlled TN panel and Polarizer, from the light of described 3 d display device outgoing successively by described can automatically controlled TN panel and described Polarizer, the direction of shaking thoroughly of wherein said Polarizer is parallel with the polarization direction of wherein a kind of polarized light of described 3 d display device outgoing.
Described 3 d display device can comprise two-dimentional display panel and the 2D/3D switching device that order is placed.
Described 2D/3D switching device can comprise polarized light conversion device and the lens subassembly that is made of single refraction rate lens and refraction of birefringence lens.
Such scheme of the present invention reduces half with the ambient light intensity of incident, makes because the colour cast degree that surround lighting causes reduces.After the adjustment by the TN panel, the 2D state still is that the display brightness of 3D state is not affected substantially, and because the polarization selective power of Polarizer will prolong the liquid crystal of display device or the serviceable life of other polymer-based material effectively liquid crystal or the very big outside ultraviolet light of other polymeric material harm are also filtered half.
Description of drawings
Fig. 1 is a kind of 2D/3D switchable stereo display device structural representation of the prior art;
Fig. 2 is subjected to the synoptic diagram of ambient light effects for lens subassembly of the prior art;
Fig. 3 is the first embodiment of the invention light path principle figure;
Fig. 4 is the light path principle figure of another embodiment of the present invention.
Embodiment
Present embodiment as shown in Figure 3, having increased by one on existing 2D/3D switchable stereo display device can automatically controlled TN (twisted nematic) panel and a Polarizer 34.Wherein the TN panel comprises the electrode 31 and 33 that applies electric field, and twisted nematic liquid crystals 32.This Polarizer 34 can make the intensity of surround lighting incident light source reduce half, thereby its scattering also reduces half, simultaneously weakening of picture signal light intensity only is the intrinsic loss of Polarizer, and when the performance of shaking thoroughly of Polarizer was enough good, this loss can be ignored substantially.
Describe the principle of work of the 2D/3D switchable stereo display device that has installed TN panel and Polarizer 34 additional below in detail.
Because the light path principle of the 2D/3D switchable stereo display device before installing TN panel and Polarizer 34 additional is identical with the prior art principle, the background technology part has had detailed description in front, here just no longer be repeated in this description, TN panel and Polarizer 34 role in light path are here only described respectively under 2D and 3D state.
The front is existing to be described, last twice light adopts the 3D mode to show, the parallel paper in polarization direction from the polarized light of lens subassembly outgoing, the polarization direction of the Polarizer 34 among Fig. 3 is parallel to paper, parallel with polarization direction from the polarized light of lens subassembly outgoing, in order not influence from the polarized light of lens subassembly outgoing, at this moment, the appropriate section of the TN panel between lens subassembly and Polarizer 34 applies electric field, like this, from the polarized light of lens subassembly outgoing during by this TN panel plane of polarization can not rotate, the direction of shaking thoroughly that adds Polarizer 34 with this moment is parallel, therefore this light can directly pass Polarizer 34, can not influence the demonstration of 3D.
The front is existing to be described, following twice light adopts the 2D mode to show, the vertical paper in polarization direction from the polarized light of lens subassembly outgoing, the parallel paper in polarization direction of the Polarizer 34 among Fig. 3, this moment is vertical with the polarization direction from the polarized light of lens subassembly outgoing, in order not influence from the polarized light of lens subassembly outgoing, at this moment, the appropriate section of the TN panel between lens subassembly and Polarizer 34 does not apply electric field, like this, from the polarized light of lens subassembly outgoing during by this TN panel plane of polarization revolve and turn 90 degrees, the direction of shaking thoroughly that adds Polarizer 34 with this moment is parallel, therefore postrotational this light of plane of polarization can directly pass Polarizer 34, can not influence the demonstration of 2D.
The polarization direction of above-mentioned Polarizer can change flexibly, in the above-described embodiments, the parallel paper in the polarization direction of Polarizer, but also can be set to vertical paper, as shown in Figure 4, like this when carrying out the 3D demonstration, appropriate section at the TN panel does not apply electric field, from the polarized light of lens subassembly outgoing during by this TN panel plane of polarization revolve and turn 90 degrees, the direction of shaking thoroughly that adds Polarizer 34 with this moment is parallel, therefore postrotational this light of plane of polarization can directly pass Polarizer 34, can not influence the demonstration of 3D.Equally, when carrying out the 2D demonstration, appropriate section at the TN panel applies electric field, from the polarized light of lens subassembly outgoing during by this TN panel plane of polarization can not rotate, the direction of shaking thoroughly that adds Polarizer 34 with this moment is parallel, therefore this light can directly pass Polarizer 34, can not influence the demonstration of 2D.Therefore, the polarization direction of the parallel or vertical emergent light that the polarization direction of Polarizer only need be provided with gets final product, and can apply electric field or not apply electric field for as the case may be the TN panel and realize purpose of the present invention.Above-mentioned TN panel can be existing TFT type TN panel.
This programme carries out polarizing filter by adding Polarizer, and reality just reduces half with the ambient light intensity of incident.And flashlight itself is a linear polarization, and after the adjustment by the TN panel, the 2D state still is that the display brightness of 3D state is not affected substantially.Make because the colour cast degree that surround lighting causes reduces.This programme also has another advantage, to the liquid crystal of display or the serviceable life of other polymer-based material have been prolonged effectively liquid crystal or the very big outside ultraviolet light of other polymeric material harm are also filtered half owing to the polarization selective power of Polarizer.
In fact all adopt by the polarization direction of conversion polarized light and realize that the 3 d display device of 2D-3D conversion can use thinking of the present invention for other, install TN panel and Polarizer additional and reduce the influence of surround lighting to display on 3 d display device.
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 (3)
1. 2D/3D display device capable of switching, comprise by the polarization direction that utilizes the conversion polarized light and realize that 2D/3D switches the 3 d display device that shows, it is characterized in that, what comprise also that order places can automatically controlled TN panel and Polarizer, from the light of described 3 d display device outgoing successively by described can automatically controlled TN panel and described Polarizer, the direction of shaking thoroughly of wherein said Polarizer is parallel with the polarization direction of wherein a kind of polarized light of described 3 d display device outgoing.
2. 2D/3D display device capable of switching according to claim 1 is characterized in that, described 3 d display device comprises two-dimentional display panel and the 2D/3D switching device that order is placed.
3. 2D/3D display device capable of switching according to claim 2 is characterized in that, described 2D/3D switching device comprises polarized light conversion device and the lens subassembly that is made of single refraction rate lens and refraction of birefringence lens.
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| CN2008101170860A CN101329450B (en) | 2008-07-24 | 2008-07-24 | Display device capable of switching from 2D to 3D |
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|---|---|---|---|
| CN2008101170860A CN101329450B (en) | 2008-07-24 | 2008-07-24 | Display device capable of switching from 2D to 3D |
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| CN101329450B true CN101329450B (en) | 2010-06-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012083525A1 (en) * | 2010-12-21 | 2012-06-28 | 海尔集团公司 | Image projection apparatus |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852922A (en) * | 2010-05-24 | 2010-10-06 | 友达光电股份有限公司 | Display device capable of switching two-dimensional and three-dimensional display modes |
| CN102143372B (en) * | 2011-03-07 | 2013-01-09 | 宇龙计算机通信科技(深圳)有限公司 | Method, device and terminal for switching view |
| CN102789084B (en) * | 2011-05-17 | 2015-04-15 | 群创光电股份有限公司 | Display device and method for displaying image |
| CN102707539B (en) * | 2012-06-05 | 2015-09-09 | 京东方科技集团股份有限公司 | A kind of 2D-3D switchable stereo display device and liquid crystal lens |
| CN110068932A (en) * | 2019-04-17 | 2019-07-30 | 成都工业学院 | A kind of time-multiplexed transparent stereo display device |
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2008
- 2008-07-24 CN CN2008101170860A patent/CN101329450B/en active Active
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|---|---|---|---|---|
| US5296952A (en) * | 1991-05-27 | 1994-03-22 | Dainippon Ink & Chemicals Inc. | Double-layer liquid crystal device having a three dimensional network structure |
| CN101025476A (en) * | 2006-02-22 | 2007-08-29 | 三星电子株式会社 | High resolution autostereoscopic display |
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| CN101329450A (en) | 2008-12-24 |
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