CN102141714A - Display device - Google Patents
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- CN102141714A CN102141714A CN2011100852027A CN201110085202A CN102141714A CN 102141714 A CN102141714 A CN 102141714A CN 2011100852027 A CN2011100852027 A CN 2011100852027A CN 201110085202 A CN201110085202 A CN 201110085202A CN 102141714 A CN102141714 A CN 102141714A
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- MRNHPUHPBOKKQT-UHFFFAOYSA-N indium;tin;hydrate Chemical compound O.[In].[Sn] MRNHPUHPBOKKQT-UHFFFAOYSA-N 0.000 description 3
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Abstract
The invention discloses a display device, which comprises a display panel, a liquid crystal lens and a backlight source; the display panel comprises a plurality of pixel units, and each pixel unit comprises a first pixel and a second pixel; the liquid crystal lens comprises a first substrate and a second substrate which are opposite, and a liquid crystal layer sealed between the first and second substrates; the liquid crystal lens also comprises an electrode; the backlight source is used for supplying rays to the display panel; the display panel, the liquid crystal lens and the backlight source are sequentially arranged; and the arrangement state of liquid crystal molecules on each liquid crystal lens unit is changed according to the voltage applied to the electrode, so that the focal length of the each liquid crystal lens unit is changed. The display device can be compatible with 2D/3D display modes, and can improve the utilization rate of light in the 2D display mode.
Description
Technical field
The present invention relates to field of liquid crystal display, be specifically related to a kind of display device.
Background technology
Along with the increase of televisor size and the raising of resolution, for offering observer's picture more true to nature, high-definition television (HDTV:High Definition Television) technology becomes the target that people constantly pursue.
As everyone knows, real world is the 3 D stereo world, and people's 3D vision effect mainly is to rely on two human eyes, and promptly the surrounding environment seen of human eye is to have the slight deviation of directivity in fact.Two eyes of the people in other words conj.or perhaps deviation that produces of the distance between two eye pupil are different.Adult's interocular distance on average is about 65 millimeters, and this just makes and form the image that two width of cloth have slight visual angle difference that on people's retina pass through the further fusion of human brain then, then the observer can perceive the image that a width of cloth has stereoeffect.
In recent years, along with the development of HDTV technology, people are also more and more higher for the pursuit of true more display image technology.Utilize the principle of this three-dimensional (3D:3Dimensional) three-dimensional imaging, left image and right image that two width of cloth have potential difference are presented to left eye and right eye respectively, promptly can obtain the sensation of 3D by display.More common 3 d display device (stereoscopic display) mainly contains at present: barrier (barrier) formula 3 d display device and lens arra (lenticular-based) formula 3 d display device.3 d display device is by signal processing unit, the image that for example can be CPU (central processing unit) (CPU) have a slight parallax with at least two width of cloth of same picture is sent to display screen, the barrier by being arranged at display screen the place ahead or the optical effect of lens arra again, the image that this at least two width of cloth has slight parallax enters observer's left eye and right eye separately as left image and right image respectively, pass through the further fusion of observer's human brain then, be perceived as the image that a width of cloth has stereoeffect.
Traditional display device, its principle that forms stereo-picture is shown in Fig. 1 a and 1b, the display device that can change mutually for the 2D/3D display mode shown in Fig. 1 a and the 1b, wherein, Fig. 1 a is depicted as this display device and carries out the principle schematic that 3D shows, Fig. 1 b is depicted as this display device and carries out the principle schematic that 2D shows.At first, with reference to figure 1a, this display device comprises successively: backlight 1 is used to provide light source; Display panel 2, this display panel 2 comprise a plurality of pixel cells by the first pixel P1 and second pixel P2 composition, and further, this display panel 2 also comprises black matrix" (BM), is used for shading; And liquid crystal lens 3, this liquid crystal lens 3 comprises first substrate 31 and second substrate 32 that is oppositely arranged with this first substrate 31, and is sealed in the liquid crystal layer 33 between this first, second substrate 31,32, this liquid crystal layer 33 is made up of thousands of liquid crystal molecule.Further, this liquid crystal lens 3 can be divided into a plurality of liquid crystal lens unit of forming by the first half liquid crystal lens unit L1 and the second half liquid crystal lens unit L2.Further, first, second substrate 31,32 of liquid crystal lens 3 is transparent glass substrate, the upper surface towards liquid crystal layer 33 at first substrate 31 is provided with first electrode 341, and is provided with second electrode 342 at the lower surface towards liquid crystal layer 33 of second substrate 32.Further, this first electrode 341 and second electrode 342 are transparency electrode, for example, can be made by tin indium oxide.
Continue with reference to figure 1a, promptly exemplarily provided the pixel cell of display panel 2 of display device of the present invention and the synoptic diagram of an its corresponding liquid crystal lens unit among the figure.Further, first electrode 341 in a liquid crystal lens unit and second electrode 342 comprise the strip shaped electric poles of a plurality of divisions respectively, and a plurality of strip shaped electric poles of first electrode 341 a plurality of strip shaped electric poles with second electrode 342 respectively are corresponding one by one, thereby form a plurality of strip shaped electric poles groups.Further, a plurality of strip shaped electric poles groups among a plurality of strip shaped electric poles groups among the first half liquid crystal lens unit L1 and the second half liquid crystal lens unit L2 are respectively corresponding to the first pixel P1 on the display panel 2 and the second pixel P2.
As shown in FIG., when when first electrode 341 and second electrode 342 apply voltage, the liquid crystal molecule of the liquid crystal layer 33 in the liquid crystal lens 3 deflects.Further, for a plurality of strip shaped electric poles groups among the first half liquid crystal lens unit L1, along the first half liquid crystal lens unit L1 and the second half L2 intersections, liquid crystal lens unit on direction away from this intersection, each voltage difference of organizing between the corresponding strip shaped electric poles is changed from small to big gradually.For example, voltage difference between the strip shaped electric poles group of the first half liquid crystal lens unit L1 and the second half L2 intersections, liquid crystal lens unit exemplarily can be 0, voltage difference between all the other strip shaped electric poles groups be followed successively by 1v, 2v ..., and the voltage difference between the strip shaped electric poles group of the second half liquid crystal lens unit L2 and the first half L1 intersections, liquid crystal lens unit exemplarily can be 0, the voltage difference between all the other strip shaped electric poles groups be followed successively by 1v, 2v ....
Continue with reference to figure 1a, because the voltage difference difference between a plurality of strip shaped electric poles groups among the first half liquid crystal lens unit L1, the second half liquid crystal lens unit L2, also difference of the deflection state that under the electric field of different voltage difference generations, produced of liquid crystal molecule then.As shown in FIG., liquid crystal molecule among the first half liquid crystal lens unit L1, the second half liquid crystal lens unit L2 is deflected to the erectility on both sides respectively by the horizontality of centre, and pass the light of this liquid crystal layer 33 can be towards along the deflection of long axis of liquid crystal molecule direction.Because the first half liquid crystal lens unit L1, the second half liquid crystal lens unit L2 are the first pixel P1 and the second pixel P2 on the corresponding display panel 2 respectively, when the shown image of the first pixel P1 and the second pixel P2 not simultaneously, promptly the first pixel P1 and the shown image of the second pixel P2 are when having two width of cloth images of slight potential difference, shown first image of the first pixel P1 is under the refraction action of the first half liquid crystal lens unit L1, only enter into observer's left eye and can not enter into observer's right eye, in like manner shown second image of the second pixel P2 is under the refraction action of the second half liquid crystal lens unit L2, only enter into observer's right eye and can not enter into observer's left eye, like this, first image and second image are under the further fusion of observer's human brain, and the observer promptly can perceive the image that a width of cloth is rich in stereoeffect.
Again in conjunction with reference to figure 1b, the principle schematic of display device under the 2D display mode that can change mutually for the 2D/3D display mode shown in it.When not applying voltage or pressure reduction between first electrode 341 and second electrode 342 and be zero, the liquid crystal molecule of the liquid crystal layer 33 in the liquid crystal lens 3 then can not deflect, and promptly refraction action does not take place for the first half liquid crystal lens unit L1 and the second half liquid crystal lens unit L2.At this moment, the first pixel P1 and the second pixel P2 in the display panel 2 show same width of cloth image, and the first pixel P1 and the shown same width of cloth image of the second pixel P2 can enter observer's left and right sides eyes simultaneously under the irradiation of backlight 1.Then this moment, the image that the observer perceives is the 2D image.
Yet, for the display device that traditional 2D/3D display mode can be changed mutually, when carrying out the 2D display mode, because the light that liquid crystal lens 3 sends for backlight 1 is in the influence that has aspect the penetrance to a certain degree, and, because the existence of black matrix" BM in the display panel 2 causes can't all penetrating display panel 2 from the light that backlight 1 sends, thereby the part light that causes backlight 1 to send is wasted, thereby has reduced the brightness of the 2D image that the observer perceives.So, for the display device that the 2D/3D display mode can be changed mutually, seek a kind of scheme that can improve the utilization factor of its light under the 2D display mode, become the industry problem demanding prompt solution.
Summary of the invention
In view of this, the present invention proposes a kind of display device, this display device can compatible 2D/3D display mode, and can improve the utilization factor of light under the 2D display mode.
For achieving the above object, technical scheme provided by the invention is as follows:
The invention provides a kind of display device, comprise display panel, liquid crystal lens and backlight;
Described display panel comprises a plurality of pixel cells, and each pixel cell comprises first pixel and second pixel;
Described liquid crystal lens comprises opposed first substrate and second substrate, and is sealed in the liquid crystal layer between first, second substrate; Described liquid crystal lens also comprises electrode;
Described backlight is used for providing light to described display panel;
It is characterized in that described display panel, liquid crystal lens and backlight set gradually; Thereby each liquid crystal lens unit changes self focal length according to putting on the ordered state that voltage on the described electrode changes liquid crystal molecule.
Further, according to an aspect of the present invention, described electrode comprises second electrode that the side towards liquid crystal molecule of first electrode that is provided with towards a side of liquid crystal molecule of described first substrate and described second substrate is provided with.
Further, described first electrode and second electrode comprise a plurality of strip shaped electric poles respectively, and a plurality of strip shaped electric poles of first electrode are corresponding one by one with a plurality of strip shaped electric poles of second electrode.
Further, described liquid crystal lens also comprises a plurality of liquid crystal lens unit, and each liquid crystal lens unit comprises the first half liquid crystal lens unit and the second half liquid crystal lens unit; On the direction away from this intersection, described voltage difference between the strip shaped electric poles one to one becomes big gradually along the first half liquid crystal lens unit and the second half intersections, liquid crystal lens unit.
Further, between the strip shaped electric poles of the strip shaped electric poles of described first electrode and described second electrode, apply voltage difference, make described backlight be positioned at the focal plane of described liquid crystal lens; The corresponding pixel cell in described each liquid crystal lens unit; And described first pixel and second pixel show two width of cloth images with slight potential difference.
Further, between the strip shaped electric poles of the strip shaped electric poles of described first electrode and described second electrode, apply voltage difference, make described backlight be positioned at the non-focal plane position of described liquid crystal lens; Described each liquid crystal lens unit is corresponding first pixel and second pixel respectively; And first pixel and second pixel show same width of cloth image.
Further, according to a further aspect of the invention, described electrode comprises first electrode and second electrode that the side towards liquid crystal molecule of described first substrate sets gradually; First electrode and second electrode are insulated layer and separate.
Further, described display device further comprises the black matrix" of crossing over first pixel and second pixel respectively, described first electrode and second electrode comprise a plurality of strip shaped electric poles respectively, each strip shaped electric poles of described first electrode is corresponding one by one with each black matrix", and a plurality of strip shaped electric poles of second electrode are corresponding with a plurality of strip shaped electric poles that are positioned at strange/even number bar of first electrode.
Further, between the adjacent strip shaped electric poles of described second electrode, apply voltage difference, and first electrode is unsettled, makes described backlight be positioned at the focal plane of described liquid crystal lens; The corresponding pixel cell in described each liquid crystal lens unit; And described first pixel and second pixel show two width of cloth images with slight potential difference.
Further, on the strip shaped electric poles of the strip shaped electric poles of described second electrode and described first electrode, apply opposite polarity voltage respectively, make described backlight be positioned at the non-focal plane of described liquid crystal lens; Described each liquid crystal lens unit is corresponding first pixel and second pixel respectively; Described first pixel and second pixel show same width of cloth image.
From technique scheme as can be seen, display device of the present invention, comprise the display panel, liquid crystal lens and the backlight that set gradually, when carrying out 2D/3D demonstration conversion, be applied to voltage on the electrode of liquid crystal lens by change, change the ordered state of liquid crystal molecule in the liquid crystal lens, further by change liquid crystal molecule to the interception of rays of incident changing the focal length of liquid crystal lens, thereby thereby make the light that sends from backlight can effectively walk around the eyes that all enter the observer basically that block of black matrix".That is to say, under the 2D display mode, effectively utilized the light backlight that is wasted, improved the brightness effects of 2D display image.
Description of drawings
Fig. 1 a is that display device is carried out the principle schematic that 3D shows, Fig. 1 b is depicted as this display device and carries out the principle schematic that 2D shows;
Fig. 2 a is that the display device of first embodiment of the invention is carried out the principle schematic that 3D shows, Fig. 2 b is depicted as the display device of this embodiment and carries out the principle schematic that 2D shows;
Fig. 3 a is that the display device of second embodiment of the invention is carried out the principle schematic that 3D shows, Fig. 3 b is depicted as the display device of this embodiment and carries out the principle schematic that 2D shows.
Embodiment
For making the purpose, technical solutions and advantages of the present invention express clearlyer,, the technical scheme of the embodiment of the invention is clearly and completely described below in conjunction with accompanying drawing.Obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.The present invention can also show as different forms, therefore the embodiment that is not limited in this explanation.Based on embodiments of the invention, all other embodiment that those of ordinary skills are obtained under the prerequisite of not making creative work belong to the scope of protection of the invention.
First embodiment
The display device of first embodiment of the invention, its principle that forms stereo-picture is shown in Fig. 2 a and 2b, the display device that can change mutually for the 3D/2D display mode shown in Fig. 2 a and the 2b, wherein, Fig. 2 a is depicted as the display device of this first embodiment and carries out the principle schematic that 3D shows, Fig. 2 b is depicted as the display device of this embodiment and carries out the principle schematic that 2D shows.At first, with reference to figure 2a, this display device comprises successively: backlight 1a is used to provide light; Liquid crystal lens 3a; And display panel 2a, this display panel 2a comprises a plurality of pixel cells by the first pixel P1 and second pixel P2 composition, further, this display panel 2a also comprises black matrix" (BM), is used for shading.In more detail, this liquid crystal lens 3a comprises the first substrate 31a and the second substrate 32a that is oppositely arranged with this first substrate 31a, and being sealed in liquid crystal layer 33a between this first, second substrate 31a, the 32a, this liquid crystal layer 33a is made up of thousands of liquid crystal molecule.Further, this liquid crystal lens 3a comprises a plurality of liquid crystal lens unit.Preferably, under the 3D display mode, each liquid crystal lens unit corresponds respectively to the pixel cell of being made up of the first pixel P1 and the second pixel P2, further, each liquid crystal lens unit is divided into corresponding with the first pixel P1 and the second pixel P2 respectively the first half liquid crystal lens unit L1a and the second half liquid crystal lens unit L2a.Further, first, second substrate 31a, the 32a of liquid crystal lens 3a are transparent glass substrate, the upper surface towards liquid crystal layer 33a at the first substrate 31a is provided with the first electrode 341a, and is provided with the second electrode 342a at the lower surface towards liquid crystal layer 33a of the second substrate 32a.Further, this first electrode 341a and the second electrode 342a are transparency electrode, for example, can be made by tin indium oxide (ITO).
Continue with reference to figure 2a, promptly exemplarily provided the pixel cell of display panel 2a of display device of first embodiment of the invention and the synoptic diagram of an its corresponding liquid crystal lens unit among the figure.Further, the first electrode 341a in a liquid crystal lens unit and the second electrode 342a comprise the strip shaped electric poles of a plurality of divisions respectively, and a plurality of strip shaped electric poles of the first electrode 341a a plurality of strip shaped electric poles with the second electrode 342a respectively are corresponding one by one, thereby form a plurality of strip shaped electric poles groups.Further, a plurality of strip shaped electric poles groups among a plurality of strip shaped electric poles groups among the first half liquid crystal lens unit L1a and the second half liquid crystal lens unit L2a are respectively corresponding to the first pixel P1 on the display panel 2a and the second pixel P2.
As shown in FIG., when when the first electrode 341a and the second electrode 342a apply voltage, the liquid crystal molecule of the liquid crystal layer 33a among the liquid crystal lens 3a deflects.Further, for a plurality of strip shaped electric poles among the first half liquid crystal lens unit L1a, along the first half liquid crystal lens unit L1a and the second half L2a intersections, liquid crystal lens unit on direction away from this intersection, each voltage difference of organizing between the corresponding strip shaped electric poles is changed from small to big gradually.For example, voltage difference between the strip shaped electric poles group of the first half liquid crystal lens unit L1a and the second half L2a intersections, liquid crystal lens unit exemplarily can be 0, voltage difference between all the other strip shaped electric poles groups be followed successively by 1v, 2v ..., and the voltage difference between the strip shaped electric poles group of the second half liquid crystal lens unit L2a and the first half L1a intersections, liquid crystal lens unit exemplarily can be 0, the voltage difference between all the other strip shaped electric poles groups be followed successively by 1v, 2v ....
Continue with reference to figure 2a, because the voltage difference difference between a plurality of strip shaped electric poles groups among the first half liquid crystal lens unit L1a, the second half liquid crystal lens unit L2a, also difference of the deflection state that under the electric field of different voltage difference generations, produced of liquid crystal molecule then.As shown in FIG., the horizontality of correspondence was deflected to the specific deflection state (for example can be the erectility of voltage correspondence when being maximal value) of correspondence when a certain specific voltage on both sides when the liquid crystal molecule among the first half liquid crystal lens unit L1a, the second half liquid crystal lens unit L2a was 0 volt by the voltage of centre respectively, and pass the light of this liquid crystal layer 33a can be towards along the deflection of long axis of liquid crystal molecule direction.Because the first half liquid crystal lens unit L1a, the second half liquid crystal lens unit L2a are the first pixel P1 and the second pixel P2 on the corresponding display panel 2a respectively, when the shown image of the first pixel P1 and the second pixel P2 not simultaneously, promptly the first pixel P1 and the shown image of the second pixel P2 are when having two width of cloth images of slight potential difference, and this moment, backlight 1 was an area source, the voltage difference of regulating between the first electrode 341a and the second electrode 342a is first group of particular value, under the voltage difference of this first group of particular value, this backlight 1a is positioned at by the first half liquid crystal lens unit L1a, the focal plane of the liquid crystal lens unit that the second half liquid crystal lens unit L2a form, further, backlight 1a is the area source of being made up of thousands of pointolite, the light beam that this each pointolite sends becomes directional light through the refraction action of liquid crystal lens unit, and further, this thousands of pointolite can send the light beam with specific dispersion angle respectively, promptly the thousands of light beam with specific dispersion angle that sends of this area source is a non-parallel beam, and the refraction action through liquid crystal lens 3a is incident to display panel 2a.Again because the first half liquid crystal lens unit L1a of liquid crystal lens 3a, the second half liquid crystal lens unit L2a are the first pixel P1 and the second pixel P2 on the corresponding display panel 2a respectively, then through the light of the first half liquid crystal lens unit L1a refraction only transmission cross the second pixel P2, and through the light of the second half liquid crystal lens unit L2a refraction only transmission cross the first pixel P1, like this, shown first image of the first pixel P1 is under the refraction action of the second half liquid crystal lens unit L2a, only enter into the observer's who is positioned at certain observation positions left eye and can not enter into observer's left eye, in like manner shown second image of the second pixel P2 is under the refraction action of the first half liquid crystal lens unit L1a, only enter into observer's right eye and can not enter into observer's left eye, like this, again because the second shown image of shown first image of the first pixel P1 and the second pixel P2 is two width of cloth images that picture material has JND, then first image and second image are under the further fusion of observer's human brain, and the observer promptly can perceive the image that a width of cloth is rich in stereoeffect.
Combination is with reference to figure 2b again, and shown in it is the principle schematic of display device under the 2D display mode of present embodiment.Be different from the 3D display mode shown in Fig. 2 a, at first under the 2D display mode, the voltage difference of regulating between the first electrode 341a and the second electrode 342a is second group of particular value, under the voltage difference of this second group of particular value, makes backlight 1a be positioned at the non-focal plane position of liquid crystal lens unit.Secondly, still between the first electrode 341a and the second electrode 342a, apply correspondent voltage, the liquid crystal molecule of liquid crystal layer 33a among the liquid crystal lens 3a still deflects under the voltage effect between the first electrode 341a and the second electrode 342a, different is with the 3D display mode, the voltage swing that puts between the first electrode 341a and the second electrode 342a changes, and promptly is being different from voltage difference at the first group of particular value that applies under the 3D display mode in the voltage difference of the second group of particular value that applies between the first electrode 341a and the second electrode 342a between the first electrode 341a and the second electrode 342a under the 2D display mode.Then the deflection state of the liquid crystal molecule among liquid crystal layer 33a this moment also changes thereupon, because the deflection state of liquid crystal molecule changes, then causes liquid crystal layer 33a that the ray refraction state that penetrates it is changed, and promptly the focal length of liquid crystal lens 3a changes.Because the account form of liquid crystal lens focal length is weighed by following formula (1):
Wherein, f is the focal length of liquid crystal lens, and r is the radius of liquid crystal lens, and Δ n is the birefraction of liquid crystal molecule among the liquid crystal layer 33a, and d is the thickness of liquid crystal layer 33a.
By formula (1) as can be known, in the liquid crystal lens 3a of present embodiment, among the liquid crystal layer 33a birefraction Δ n of liquid crystal molecule with and thickness d determine, and by the voltage swing between the first electrode 341a and the second electrode 342a among the adjusting liquid crystal lens 3a, promptly regulate the voltage extent of respectively organizing among the first half liquid crystal lens unit L1a and the second half liquid crystal lens unit L2a between the corresponding strip shaped electric poles, thereby can regulate to determine the radius r of liquid crystal lens, thereby determine the focal distance f of liquid crystal lens by formula (1).
Further, under the 2D of present embodiment display mode, the focal distance f of regulating liquid crystal lens 3a makes it to diminish, behind the refraction action of light that backlight 1a sends through liquid crystal lens 3a, emergent ray can all be walked around the black matrix" BM on the display panel 2a basically, correspondingly, by adjusting the focal distance f size of liquid crystal lens 3a, with a pixel cell accordingly, can also can equivalence form a plurality of liquid crystal lens unit in liquid crystal lens unit of equivalence formation, for example shown in Fig. 2 b, be the present invention's one most preferred embodiment, promptly corresponding to a pixel cell, equivalence has formed two liquid crystal lens unit, the first pixel P1 or the first pixel P2 in the corresponding pixel cell in each liquid crystal lens unit.Further, under the 2D display mode, first pixel P1 on the display panel 2a and the shown image of the second pixel P2 are same width of cloth image, like this, the observer who is positioned at another certain observation positions is under the effect of this liquid crystal lens 3a, observe the identical image that display panel 2a shows simultaneously, the image that promptly perceives is the 2D effect.
Further, because the light backlight that refraction is assembled through liquid crystal lens 3a can all be walked around blocking of black matrix" basically, then the light that sends of backlight 1a can all penetrate display panel 2a basically and enter observer's eyes, thereby the utilization factor of the light that raising backlight 1a sends, the brightness of the 2D image that the raising observer perceives.
Second embodiment
The display device of second embodiment of the invention, its principle that forms stereo-picture is shown in Fig. 3 a and 3b, Fig. 3 a is that the display device of second embodiment of the invention is carried out the principle schematic that 3D shows, Fig. 3 b is depicted as the display device of this embodiment and carries out the principle schematic that 2D shows.Among second embodiment, liquid crystal lens 3b is arranged between backlight 1b and the display panel 2b equally, different with first embodiment is that the structure of liquid crystal lens 3b is provided with different in the display device of present embodiment.Shown in Fig. 3 a, the liquid crystal lens 3b of present embodiment comprises successively: the first substrate 31b and the second substrate 32b that is oppositely arranged with this first substrate 31b, and being sealed in liquid crystal layer 33b between this first, second substrate 31b, the 32b, this liquid crystal layer 33b is made up of thousands of liquid crystal molecule.Further, first, second substrate 31b, the 32b of liquid crystal lens 33b are transparent glass substrate, the side towards liquid crystal layer 33b at the first substrate 31b is disposed with the first electrode 341b and the second electrode 342b, wherein, the first electrode 341b and the second electrode 342b are arranged on the different layers, and isolate fully by insulation course 343b between it.Further, the first electrode 341b and the second electrode 342b also are the strip shaped electric poles of division, and each strip shaped electric poles of the first electrode 341b corresponding with each black matrix" BM (promptly each strip shaped electric poles of the first electrode 341b be arranged at each black matrix" BM under), and each strip shaped electric poles of each strip shaped electric poles of the second electrode 342b and the first electrode 341b corresponding at interval respectively (promptly each strip shaped electric poles of the second electrode 342b is arranged at respectively directly over the strip shaped electric poles of each odd-numbered line/row of the first electrode 341b or even number line/row).Further, this first electrode 341b and the second electrode 342b are transparency electrode, for example, can be made by tin indium oxide (ITO).
Continue with reference to figure 3a, exemplarily, when between the strip shaped electric poles of the second electrode 342b, forming voltage difference, and the strip shaped electric poles of the first electrode 341b is unsettled, then a plurality of liquid crystal molecules among the liquid crystal layer 33b are arranged along the direction of electric field line under the effect of electric field of the strip shaped electric poles formation of the second electrode 342b.Identical under the 3D display mode with first embodiment, the corresponding pixel cell equivalence of arranging of this liquid crystal molecule forms a liquid crystal lens unit Lb.Identical with first embodiment, this moment, backlight 1 was an area source, and the non-parallel beam that this area source sends is incident to display panel 2b through the refraction action of liquid crystal lens 3b.Its principle of work that forms the 3D display effect is not done herein and is given unnecessary details with first embodiment.
Then with reference to figure 3b, between the strip shaped electric poles of the strip shaped electric poles of the first electrode 341b and the second electrode 342b, form voltage difference, for example second electrode in each liquid crystal lens unit just is being applied in (bearing) voltage, first electrode is applied in negative (just) voltage, as shown in FIG., then a plurality of liquid crystal molecules among the liquid crystal layer 33b are arranged along the direction of electric field line under the effect of electric field that forms between the strip shaped electric poles of the strip shaped electric poles of the first electrode 341b and the second electrode 342b.Equally, identical under the 2D display mode with first embodiment, the shown image of the first pixel P1 on the display panel 2b and the second pixel P2 also is same width of cloth image, the focal distance f of regulating liquid crystal lens 3b makes it to diminish, behind the refraction action of light through liquid crystal lens 3b that backlight 1b sends, emergent ray can all be walked around the black matrix" BM on the display panel 2a basically.Certainly, in this embodiment, for the 2D display mode, the focal distance f that voltage difference between strip shaped electric poles that can be by regulating the first electrode 341b and the strip shaped electric poles of the second electrode 342b is regulated liquid crystal lens 3b, thereby with a pixel cell accordingly, form quantity and be not limited only to 1 liquid crystal lens unit.For example, as shown in Fig. 3 b, be another most preferred embodiment of the present invention, promptly corresponding to a pixel cell, equivalence has formed two liquid crystal lens unit, the first pixel P1 or the first pixel P2 in the corresponding pixel cell in each liquid crystal lens unit, in response to quantity and the position of the black matrix" BM among the display panel 2b, the feasible light that sends from back light 1b can all be walked around the black matrix" BM the display panel 3b basically.In this embodiment, the observer is in the image of watching the 2D display effect, and the brightness effects of image can not reduce yet.
Through detailed description to above embodiment, can see, the display device of two embodiment of the present invention, comprise the display panel, liquid crystal lens and the backlight that are arranged in order, carrying out when 2D/3D shows conversion, be applied to voltage on the electrode of liquid crystal lens by change, changing the ordered state of liquid crystal molecule in the liquid crystal lens, with the change focal length, thereby make the light that sends from backlight can effectively penetrate the eyes that display panel enters the observer.That is to say, under the 2D display mode, effectively utilized the light backlight that is wasted, improved the brightness effects of 2D display image.
Though the present invention with preferred embodiment openly as above; but it is not to be used for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can make possible change and modification, so protection scope of the present invention should be as the criterion with the scope that claim of the present invention was defined.
Claims (10)
1. a display device comprises display panel, liquid crystal lens and backlight;
Described display panel comprises a plurality of pixel cells, and each pixel cell comprises first pixel and second pixel;
Described liquid crystal lens comprises opposed first substrate and second substrate, and is sealed in the liquid crystal layer between first, second substrate; Described liquid crystal lens also comprises electrode;
Described backlight is used for providing light to described display panel;
It is characterized in that described display panel, liquid crystal lens and backlight set gradually; Thereby each liquid crystal lens unit changes self focal length according to putting on the ordered state that voltage on the described electrode changes liquid crystal molecule.
2. display device as claimed in claim 1 is characterized in that, described electrode comprises second electrode that the side towards liquid crystal molecule of first electrode that is provided with towards a side of liquid crystal molecule of described first substrate and described second substrate is provided with.
3. display device as claimed in claim 2 is characterized in that, described first electrode and second electrode comprise a plurality of strip shaped electric poles respectively, and a plurality of strip shaped electric poles of first electrode are corresponding one by one with a plurality of strip shaped electric poles of second electrode.
4. display device as claimed in claim 3 is characterized in that, described liquid crystal lens also comprises a plurality of liquid crystal lens unit, and each liquid crystal lens unit comprises the first half liquid crystal lens unit and the second half liquid crystal lens unit; On the direction away from this intersection, described voltage difference between the strip shaped electric poles one to one becomes big gradually along the first half liquid crystal lens unit and the second half intersections, liquid crystal lens unit.
5. as any described display device of claim 2 to 4, it is characterized in that, between the strip shaped electric poles of the strip shaped electric poles of described first electrode and described second electrode, apply voltage difference, make described backlight be positioned at the focal plane of described liquid crystal lens; The corresponding pixel cell in described each liquid crystal lens unit; And described first pixel and second pixel show two width of cloth images with slight potential difference.
6. as any described display device of claim 2 to 4, it is characterized in that, between the strip shaped electric poles of the strip shaped electric poles of described first electrode and described second electrode, apply voltage difference, make described backlight be positioned at the non-focal plane position of described liquid crystal lens; Described each liquid crystal lens unit is corresponding first pixel and second pixel respectively; And first pixel and second pixel show same width of cloth image.
7. display device as claimed in claim 1 is characterized in that, described electrode comprises first electrode and second electrode that the side towards liquid crystal molecule of described first substrate sets gradually; Described first electrode and second electrode are insulated layer and separate.
8. display device as claimed in claim 7, it is characterized in that, described display device further comprises the black matrix" of crossing over first pixel and second pixel respectively, described first electrode and second electrode comprise a plurality of strip shaped electric poles respectively, each strip shaped electric poles of described first electrode is corresponding one by one with each black matrix", and a plurality of strip shaped electric poles of second electrode are corresponding with a plurality of strip shaped electric poles that are positioned at strange/even number bar of first electrode.
9. as any described display device of claim 7 to 8, it is characterized in that, between the adjacent strip shaped electric poles of described second electrode, apply voltage difference, and first electrode is unsettled, makes described backlight be positioned at the focal plane of described liquid crystal lens; The corresponding pixel cell in described each liquid crystal lens unit; And described first pixel and second pixel show two width of cloth images with slight potential difference.
10. as any described display device of claim 7 to 8, it is characterized in that, on the strip shaped electric poles of the strip shaped electric poles of described second electrode and described first electrode, apply opposite polarity voltage respectively, make described backlight be positioned at the non-focal plane of described liquid crystal lens; Described each liquid crystal lens unit is corresponding first pixel and second pixel respectively; Described first pixel and second pixel show same width of cloth image.
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