CN101387758A - 2D-3D convertible stereo display device - Google Patents
2D-3D convertible stereo display device Download PDFInfo
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- CN101387758A CN101387758A CNA2007101218117A CN200710121811A CN101387758A CN 101387758 A CN101387758 A CN 101387758A CN A2007101218117 A CNA2007101218117 A CN A2007101218117A CN 200710121811 A CN200710121811 A CN 200710121811A CN 101387758 A CN101387758 A CN 101387758A
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Abstract
The invention discloses a 2D-3D conversable stereo display device, comprising: a device providing image light, a polarized light converter and a lens component, wherein the device providing image light is used for providing image lights of linear polarization, the polarized light converter is used for controllably transmitting the incident image lights of linear polarization completely or incompletely, or rotating the incident image lights into the polarization light vertical to the incident polarization direction, the emergent light is input to the lens component, the lens component comprises a single-refraction lens and a dual-refraction lens which form a combination lens and both comprise a plane part and a relative curve part, the cure parts of the two lenses are wedged with each other, the combination lens can present a convex lens for one of the two polarization light output by the polarization light converter after rotation or no rotation, and can present a plate lens. The 2D-3D conversable stereo display device can freely realize 2D-3D conversion.
Description
Technical field
The present invention relates to the stereo display field, relate in particular to a kind of device that can carry out 2D or 3D conversion in any zone of screen.
Background technology
The mankind are that the nuance of the object seen by right eye and left eye comes the degree of depth of perceptual object, thereby identify stereo-picture, and this species diversity is called as parallax.Stereo display technique is exactly the parallax that comes manufacturer's right and left eyes by artificial means, send to two width of cloth images of parallax respectively to images of left and right eyes, makes brain after having obtained the different images that right and left eyes sees, produces the sensation of observing the true three-dimension object.3 d display device generally has dual mode: slit grating formula 3 d display device and microlens array 3 d display device.Wherein the microlens array 3 d display device comprises display panel and is installed in the microlens array in display panel the place ahead, thereby the 3D rendering that will come from display panel is divided into right eye and left-eye image.
Above-mentioned conventional microlens formula 3 d display device can't be realized the conversion between the 2D-3D, has brought inconvenience to use.Therefore need a kind of autostereoscopic display apparatus, it can be changed between 2D and 3D pattern according to the picture signal that is provided.At this demand, a lot of research work have been carried out.Mention a kind of 2D-3D convertible automatic stereo display device as patent documentation US5500765, the scioptics sheet moves the conversion that realizes between the 2D-3D at the machinery on the display panel.But the influence of factors such as the realization of this mechanical switch principle is vibrated, humidity, dust and wayward.Patent documentation US6069650 has utilized liquid crystal that ordinary light (o light) and extraordinary ray (e light) are produced different refractive indexes with CN1892289 and has realized the 2D-3D conversion in addition, they all need be at the conductive layer of lenticular surface plating electrically conductive layer or gradient-structure, to reach the purpose of control liquid crystal director direction.Fig. 1 has represented the structure and the principle of traditional 2D-3D convertible automatic stereo display device.As Fig. 1, this device mainly comprises display panel 1, microlens array 2, transparent flat plate 5 in the face of microlens array, electrically conductive layer or gradient electrode layer 3 on lenticule and transparent flat plate surface, be filled in the liquid crystal 4 between microlens array and the transparent flat plate, and the electrode 6 that is connected to two electrically conductive layers or gradient electrode layer.According to this structure, when not having voltage to be applied to electrode 6, the director that the polarization direction of incident polarized light is parallel to liquid crystal is an optical axis direction, and the refractive index that sees through liquid crystal as Fig. 2 A light this moment is n
e, and n
eThe refractive index n that is not equal to microlens material
p, light reflects on the lenticule surface, is shown as 3D effect.When applying a voltage to electrode 6, as Fig. 2 B, form electric field between the electrically conductive layer between microlens array and the transparent flat plate, the liquid crystal director direction is changed into according to direction of an electric field and is arranged, the polarization direction of incident polarized light is an optical axis direction perpendicular to the director of liquid crystal, and the refractive index that light sees through liquid crystal is n
o, this moment n
oEqual the microlens material refractive index n
p, light passes lenticule 2, liquid crystal 4 and transparent flat plate 5 under situation about not reflecting, be shown as the 2D effect.
Because the microlens array accuracy requirement is very high, and is non-smooth surface, therefore this technology at microlens array surface plating electrically conductive layer or gradient electrode layer is very difficult, and the precision of having plated the microlens array that is difficult to guarantee behind the electrically conductive layer; And voltage is applied on the electrically conductive layer between lenticule battle array and the transparent flat plate, form electric field, the spacing of this electric field is big, electric field intensity is very little under the identical situation of supply voltage, the time that liquid crystal director between microlens array and transparent panel trend electric field is arranged and when cancelling electric field liquid crystal director to get back to time of original position of orientation very long, thereby the response time that causes this device to be changed between 2D-3D is very long, makes spectators' eyes produce sense of discomfort.And above-mentioned existing 2D-3D conversion can not realize independent control to each pixel, shows solid and plane picture simultaneously can not for spectators, can not dynamically show solid or plane picture more, and the function of demonstration and effect are all not as people's will.
Summary of the invention
The object of the present invention is to provide a kind of 3 d display device, can carry out the demonstration of 2D and 3D simultaneously, and can carry out the 2D-3D conversion of subregion at screen area.And slewing rate is fast, and it is low to implement difficulty.
To achieve the object of the present invention, provide a kind of 2D-3D convertible 3 d display device, comprising: the device of image light is provided, also comprises polarized light conversion device and lens subassembly;
The described device that image light is provided is used to provide the image light of linear polarization;
Described polarized light conversion device is used for the vertical polarized light in polarization direction when controllable image light the described linear polarization of incident is all or part of not to be rotated direct transmission or be rotated into incident, and the light of outgoing incides described lens subassembly;
Described lens subassembly, comprise single refraction rate lens and refraction of birefringence lens, and described single refraction rate lens and described refraction of birefringence lens constitute compound lens, described two lens include planar section and curvature portion on the other side, the curvature portion of two lens agrees with mutually, this compound lens is to described polarized light conversion device rotation back or do not rotate wherein a kind of convex lens that show as in two kinds of polarized lights of outgoing, and another kind is shown as plano lens.
Described single refraction rate lens are convex lens, and the refractive index of described single refraction rate lens equals one of them refractive index of described refraction of birefringence lens and greater than the another one refractive index.
Preferably, described refraction of birefringence lens is convex lens, and the refractive index of described single refraction rate lens equals one of them refractive index of described refraction of birefringence lens and less than the another one refractive index.
Preferably, the refractive index of described refraction of birefringence lens comprises the ordinary refraction index n with respect to ordinary light
oWith extraordinary ray refractive index n with respect to extraordinary ray
e, the refractive index of described single refraction rate lens equals described ordinary refraction index n
oAnd greater than described extraordinary ray refractive index n
e
Preferably, the refractive index of described refraction of birefringence lens comprises the ordinary refraction index n with respect to ordinary light
oWith extraordinary ray refractive index n with respect to extraordinary ray
e, the refractive index of described single refraction rate lens equals described extraordinary ray refractive index n
eAnd greater than described ordinary refraction index n
o
Preferably, the refractive index of described refraction of birefringence lens comprises the ordinary refraction index n with respect to ordinary light
oWith extraordinary ray refractive index n with respect to extraordinary ray
e, the refractive index of described single refraction rate lens equals described ordinary refraction index n
oAnd less than described extraordinary ray refractive index n
e
Preferably, the refractive index of described refraction of birefringence lens comprises the ordinary refraction index n with respect to ordinary light
oWith extraordinary ray refractive index n with respect to extraordinary ray
e, the refractive index of described single refraction rate lens equals described extraordinary ray refractive index n
eAnd less than described ordinary refraction index n
o
Preferably, described polarized light conversion device, comprise: control module, to have a circuit of thin film transistor (TFT) dull and stereotyped and all be coated with the liquid crystal layer of oriented layer and transparency electrode successively at opposite first and second surface, wherein, transparency electrode on the described first surface is cut at least two, thin film transistor (TFT) in the described circuit flat board is connected with transparency electrode on the described first surface, and described control module and described thin film transistor (TFT) are connected with transparency electrode on the described second surface; Described control module can independently be controlled each transparency electrode on the described first surface and the voltage between the transparency electrode on the described second surface by described thin film transistor (TFT);
When between transparency electrode on the first surface and the transparency electrode on the second surface during no-voltage, the polarization direction that the polarization direction of passing the linearly polarized photon of the liquid crystal layer between the described transparency electrode is rotated to incident the time is vertical; When having predetermined voltage between transparency electrode on the first surface and the transparency electrode on the second surface, the linearly polarized photon that passes does not rotate.
Preferably, the described device of image light that provides comprises the display panel that linearly polarized photon can be provided.
Preferably, the described device of image light that provides comprises the display panel and the polarizer that nonlinear polarization light is provided, the described polarizer is placed between described display panel and the described polarized light conversion device, and the nonlinear polarization phototransformation that described display panel is sent is a linearly polarized photon.
Utilize technique scheme of the present invention, can on screen, zones of different carry out the demonstration of 2D and 3D simultaneously, and can carry out the 2D-3D conversion arbitrarily.And slewing rate is fast, and it is low to implement difficulty.
Description of drawings
Fig. 1 is traditional 2D-3D convertible automatic stereo display device synoptic diagram;
Fig. 2 A is a polarized light when being incident on device shown in Figure 1, the index path under powering state not;
Fig. 2 B is a polarized light when being incident on device shown in Figure 1, the index path under powering state;
Fig. 3 is the primary structure figure of TFT type LCD in the prior art;
Fig. 4 is the panel array synoptic diagram of TFT LCD in the prior art;
Fig. 5 is the circuit diagram of a pixel cell in the TFT LCD in the prior art;
Fig. 6 is the structure and the index path of the 3 d display device of embodiment (1);
Fig. 7 is the structure and the index path of the 3 d display device of embodiment (2);
Fig. 8 is the structure and the index path of the 3 d display device of embodiment (3);
Fig. 9 is the structure and the index path of the 3 d display device of embodiment (4).
Embodiment
Mainly used the similar techniques of TFT display screen in the stereo display scheme of the present invention, before specifying the solution of the present invention, at first relative theory and the work to TFT display screen in the prior art is used as a brief description.So that the back can more clearly illustrate technical scheme of the present invention, TFT is the abbreviation of " Thin Film Transistor ", be Thin Film Transistor (TFT), so-called thin film transistor (TFT) is meant that each the liquid crystal pixel point on the LCD all is to be driven by the thin film transistor (TFT) that is integrated in thereafter.Thereby can accomplish high-speed, high brightness and high-contrast display screen information.
The TFT liquid crystal all is provided with a semiconductor switch for each pixel, each pixel can directly be controlled by a pulse, thereby each node is all relatively independent, and can stepless control, not only improved the reaction velocity of display screen, simultaneously can accurately control display level, so the color of TFT liquid crystal is trueer.The characteristics of TFT LCDs are good brightness, contrast height, stereovision is strong and bright-colored.Referring to Fig. 3, the main formation of the LCD of TFT type comprises: white light source 31, Polarizer 32, comprise the circuit flat board 33 of thin film transistor (TFT), filter 34 and polaroid 35 have glass substrate, alignment film, transparency electrode and liquid crystal material etc. between circuit dull and stereotyped 33 and filter 34.The TFT LCD often adopts the wire liquid crystal (or being referred to as rod shaped liquid crystal) of TN (Twisted nematic) type.Fig. 4 is the panel array synoptic diagram of TFT LCD, and S1-SN is Source line (also being data line) among the figure, and G1-GM is Gate line (also being sweep trace), and dash area is the show electrode that covers liquid crystal surfactant.Be indicated as common electrode (public electrode) at another of the liquid crystal relative with show electrode.The electric field that utilizes show electrode and common electrode to produce changes the orientation of two interelectrode TN type liquid crystal molecules, reaches the effect of demonstration with the transmissivity that changes incident polarized light.The unit that is made of transistor and show electrode among Fig. 4 needs three in a pixel, respectively three sub-pixels of corresponding RGB.With the TFT LCD of a 1024*768 resolution, need 1024*768*3 such unit altogether.The waveform that the Gate line is sent is opened the TFT of each row in regular turn, allow whole row's Source line simultaneously the display dot of a full line is charged to required separately voltage well, show different GTGs, when this delegation is charged, the Gate line is just closed voltage, the Gate line of next line is just opened voltage then, has an identical row Source line that the display dot of next line is discharged and recharged again.Realization is carried out independent control to the sub-pixel of each pixel.
Fig. 5 is the circuit diagram of a pixel cell in the Thin Film Transistor-LCD, and it mainly comprises thin film transistor (TFT) 51, a liquid crystal display 52 and a memory capacitance 53.And wherein memory capacitance 53 is connected in parallel to this liquid crystal display 52 (liquid crystal display 52 itself has certain capacitance stores ability), in order to strengthen the not enough originally charge storage of liquid crystal display 52 (certainly, if the charge storage of liquid crystal display 52 is very sufficient, then do not need extra memory capacitance 53), and then when improving thin film transistor (TFT) 51 and closing, the magnitude of voltage of the liquid crystal display 52 too fast phenomenon that descends.In liquid crystal display 52, comprise TN type liquid crystal 523, transparency electrode 521,522, in transparency electrode 521,522 liquid crystal side scribbles oriented layer, because liquid crystal molecule has a specific character, be exactly that residing electric field can not be constant always, not so of long duration, even voltage is canceled, liquid crystal molecule can can't answer the variation of electric field to rotate because of the destruction of characteristic again, to form different GTGs, therefore the display voltage in the LCD has been divided into two kinds of polarity, one is positive polarity, and another is a negative polarity, no matter be positive polarity or negative polarity, the GTG of one group of same brightness can be arranged all, so when the pressure reduction absolute value of layer glass up and down is fixedly the time, the GTG that is showed is the same.Only using among the present invention can be to independent control structure of every bit and function in the TFT LCD, only need realize not transmission and two kinds of situations of total transmissivity, promptly only needing has pressure reduction and two kinds of situations of no pressure reduction between the control transparency electrode 521 and 522, when pressure reduction is arranged, the orientation of the whole para-electrics of the orientation of liquid crystal molecule field makes incident polarized light not rotate direct transmission; During no pressure reduction, incident polarized light is rotated by 90 degrees the back transmission.To the TFT display technology, can also consult disclosed patent documentations such as CN1410822A, CN1420383A, CN1423160 and CN1455290A.
The structure and the principle of work of TFT LCD have been described above, will have described specific embodiments of the invention in detail below.
Embodiment (1): Fig. 6 is the structure and the index path of the 3 d display device of present embodiment, figure Stereo display device comprises: provide 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, oriented layer 12a, 12b and nematic liquid crystal 13 as public electrode, wherein be made of a plurality of ITO unit that are not electrically connected mutually as the ito glass 11a of drive electrode, the ITO unit can be square, circular or other is irregularly shaped; 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 by thin film transistor (TFT), the molecular orientation of two oriented layer 12a, 12b is vertical mutually.Above-mentioned polarized light conversion device also can adopt the thin-film transistor circuit among the TFT of the prior art fully, because of this technical maturity, gives unnecessary details so seldom do.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 the present embodiment
1, birefraction concavees lens 15 have ordinary refraction index n
oWith the extraordinary ray refractive index n
e, and n
1=n
o, n
oN
eWherein the single refraction lens material can be high molecular polymer or other rigid transparent materials, and the material of refraction of birefringence lens can be selected the negativity nematic liquid crystal, or cholesteric liquid crystal or kalzit; If the selection liquid crystal can be filled under liquid state and entered in the space that is made of single refraction rate lens 14 and glass sheet 16.Apply oriented layer 12c on glass substrate 16 surfaces, for example apply alignment agent (oriented layer 12c can be non-conterminous with glass substrate 16 in other embodiment of back) and also pass through orientation process (as applying alignment agent) on single refraction convex lens 14 surfaces and make that the polarization direction of polarized light of liquid crystal arrangement direction and display device outgoing is identical liquid crystal.Certainly, can set flexibly, here concrete example just according to the setting of polarized light conversion device.
Describing the light path principle of this embodiment below according to Fig. 6, 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 6, 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, therefore concavees lens 15 are ne for this ray refraction rate, 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 the present embodiment, 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 the inside TN type 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.
In fact, single refraction rate convex lens 14 can change on combination form slightly with birefraction concavees lens 15 in the present embodiment, with the combination Rotate 180 degree of concavees lens 15 and convex lens 14.Make the planar section of concavees lens face the incident direction of light, the convex portions of convex lens 14 also faces toward the direction of light incident.When the polarization direction of the light that incides compound lens was parallel to the orientation of liquid crystal of birefraction concavees lens 15, with respect to this polarized light, the refractive index of birefraction concavees lens 15 was ne, because the refractive index n of single refraction convex lens 14
1Greater than n
eSo compound lens still shows as convex lens, the light of incident is reflected, be shown as 3D effect.When the polarization direction of the light that incides compound lens during perpendicular to the orientation of the liquid crystal of refraction of birefringence lens, with respect to this polarized light, the refractive index of birefraction concavees lens 15 is n
o, because the refractive index n of single refraction convex lens 14
1Equal n
o, do not reflect during the compound lens of light by convex lens 14 and concavees lens 15, carry out the 2D mode and show.
Be orientation if incide the polarization direction of the polarized light of polarized light conversion device in the present embodiment perpendicular to the birefraction liquid crystal, then, above-mentioned control procedure is opposite, that is: the pairing light of the part that does not power up in the polarized light conversion device carries out the 3D mode and shows; The pairing light of the part that powers up carries out the 2D mode and shows.
Certainly, the polarized light that no matter incides polarized light conversion device is any direction, the liquid crystal molecular orientation of the incident end of this polarized light conversion device must be identical with the polarization direction of incident polarized light, make polarized light to be rotated by 90 degrees, as long as and can control rotation and do not revolve the device that turn 90 degrees and to cooperate compound lens to realize purpose of the present invention.Those skilled in the art can flexible configuration according to explanation of the present invention.
Execute structure and the index path of example (2): Fig. 7 for the present embodiment 3 d display device, the light path that comprises four road light equally, the light path of the light path of last twice light and following twice light, compare with example (1) (not shown display panel 10), difference is that the liquid crystal in the selected birefraction concavees lens 15 is that optics positivity liquid crystal (is n
eN
o), as the positivity nematic liquid crystal, and the Liquid Crystal Molecules Alignment direction of birefraction concavees lens 15 is vertical with the polarized light direction of vibration that incides polarized light conversion device.And the refractive index n of single refraction rate convex lens 14
1Equal n
e, n then
1N
o
The light path principle of twice light is gone up in explanation earlier, for last twice light, 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 vertical with the Liquid Crystal Molecules Alignment direction of concavees lens 15, so concavees lens 15 are n for this ray refraction rate
o, because the refractive index n of single refraction rate convex lens 14
1Greater than n
o, 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: 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 the inside TN type 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 of light was parallel 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
e, because the refractive index n of single refraction convex lens 14
1Equal n
e, 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.
Single refraction rate convex lens 14 can change on combination form equally slightly with birefraction concavees lens 15 in the present embodiment, with the combination Rotate 180 degree of concavees lens 15 and convex lens 14.Make the planar section of concavees lens face the incident direction of light, the convex portions of convex lens 14 is facing to the direction of light incident.When the polarization direction of the light that incides compound lens during perpendicular to the orientation of birefraction liquid crystal, refractive index is n
o, the refractive index n of single refraction convex lens 14
1N
oSo compound lens still shows as convex lens, the light of incident is reflected, show 3D effect.When the polarization direction of the light that incides compound lens is parallel to the orientation of birefraction liquid crystal, show the 2D effect.
Embodiment (3): Fig. 8 is the structure and the index path of the 3 d display device of present embodiment, figure Stereo display device comprises equally: provide image display panel 10 (not shown)s, 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 the lens subassembly that constitutes by single refraction rate lens and refraction of birefringence lens, the difference of present embodiment and embodiment (1) only is the formation of lens subassembly.Lens subassembly comprises birefraction convex lens 17, single refraction rate concavees lens 18 and glass substrate 16 in the present embodiment, also be included in the lip-deep oriented layer 12c of planar section of birefraction convex lens 17, convex lens 17 adopt the birefraction material, usually select liquid crystal for use, select optics positivity liquid crystal in the present embodiment for use, refractive index is respectively n
oAnd n
e, n
eN
o Concavees lens 18 adopt single refraction rate material, and refractive index is n
1, choose suitable material and make n
1=n
oClosely paste mutually with glass substrate 16 at the back side (planar section) of the concavees lens 18 of single refraction rate, there is oriented layer 12c at the back side of convex lens 17 (planar section), be close to ito glass 11b, concave part at concavees lens has also carried out orientation process equally, and the direction of orientation of the liquid crystal in the convex lens 17 is identical with the polarization of light direction that incides polarized light conversion device.
Be the index paths of four road light among Fig. 8, wherein go up twice light and reflect at last that the direct transmission of following twice light specifies their principle below respectively by apparatus of the present invention.
As can be seen from Figure 8, 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 17 and incide concavees lens 18, this moment, the polarization direction of light was parallel with the liquid crystal arrangement direction of convex lens 17, so convex lens 17 are the extraordinary ray refractive index n for this ray refraction rate
e, because the refractive index n of single refraction rate concavees lens 18
1Less than n
e, promptly this moment, single refraction rate concavees lens 18 refractive index was less than the refractive index of the formed convex lens 17 of birefraction liquid crystal, so the optical effect of compound lens is convex lens, and light reflects through the convex surface of out-of-date meeting at convex lens 17.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 the present embodiment, 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 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 the inside TN type 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 birefraction convex lens 17, inject to the concave part of single refraction rate concavees lens 18 from convex portions, this moment, the polarization direction was vertical with the Liquid Crystal Molecules Alignment direction of convex lens 17, therefore convex lens 17 are no with respect to this polarized light refractive index, because the refractive index n of single refraction concavees lens 18
1Equal n
o, promptly this moment, birefraction convex lens 17 refractive index was identical with the refractive index of concavees lens 18, so this polarized light does not reflect the light straight-line pass at the interface at convex lens 17 and concavees lens 18.In this case, this 3 d display device adopts the 2D mode to show described twice light down.
And birefraction convex lens 17 can change on combination form equally slightly with injection rate concavees lens 18 in the present embodiment, with the combination Rotate 180 degree of concavees lens 18 and convex lens 17.Make the planar section of concavees lens face the incident direction of light, the convex portions of convex lens 17 is facing to the direction of light incident.When the polarization direction of the light that incides compound lens was parallel to the orientation of liquid crystal in the birefraction convex lens 17, refractive index was n
e, the refractive index n of birefraction convex lens 17
eGreater than n
1So compound lens still shows as convex lens, the light of incident is reflected, 3 d display device carried out the 3D mode with light and showed this moment.When the polarization direction of the light that incides compound lens perpendicular to birefraction convex lens 17 in during the orientation of liquid crystal, then carry out the 2D mode and show.
Embodiment (4): as shown in Figure 9, be that with the difference of embodiment (4) liquid crystal of selected convex lens 17 is optics negative liquid crystal, i.e. n
oN
e, and make the refractive index n of single refraction rate concavees lens 18
1Equal n
e, the polarization direction of polarized light of inciding polarized light conversion device this moment is vertical with the liquid crystal arrangement direction of convex lens 17.
The light path principle of twice light is gone up in explanation earlier, for last twice light, 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 17 and incide concavees lens 18, this moment, the polarization direction of light was vertical with the Liquid Crystal Molecules Alignment direction of convex lens 17, so convex lens 17 are n for this ray refraction rate
o, because the refractive index n of single refraction rate concavees lens 18
1Less than n
o, promptly this moment, birefraction convex lens 17 refractive index was greater than the refractive index of single refraction rate concavees lens 18, so the optical effect of compound lens is convex lens, and light reflects through the interface of out-of-date meeting at convex lens 17 and concavees lens 18.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 the present embodiment, 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 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 the inside TN type 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 birefraction convex lens 17, inject to single refraction rate concavees lens 18 from convex portions, this moment, the polarization direction of light was parallel with the Liquid Crystal Molecules Alignment direction of convex lens 17, therefore convex lens 17 are ne with respect to this polarized light refractive index, because the refractive index n of single refraction concavees lens 18
1Equal n
e, promptly the refractive index of birefraction convex lens 17 is identical with the refractive index of concavees lens 18 at this moment, so this polarized light does not reflect the light straight-line pass at the interface place of convex lens 17 and concavees lens 18.In this case, this 3 d display device adopts the 2D mode to show described twice light down.
Birefraction convex lens 17 can change on combination form equally slightly with injection rate concavees lens 18 in the present embodiment, combination Rotate 180 degree with concavees lens 18 and convex lens 17, make the planar section of concavees lens face the incident direction of light, the convex portions of convex lens 17 is facing to the direction of light incident.When the polarization direction of the light that incides compound lens during perpendicular to the orientation of the liquid crystal of birefraction convex lens 17, the refractive index of birefraction convex lens 17 is n
o, because n
oGreater than n
1So compound lens still shows as convex lens, the light of incident is reflected, 3 d display device carried out the 3D mode with light and showed this moment.When the polarization direction of the light that incides compound lens is parallel to the orientation of liquid crystal of birefraction convex lens 17, carries out the 2D mode and show.
By above-mentioned four embodiment as can be known, in the lens subassembly, three kinds of refractive index ns are arranged
o, n
eAnd n
1, must have two to equate in three kinds of refractive indexes, obviously n
oAnd n
eCan not equate to have only n
1Equal n
eAnd n
oIn one of them, if n
1Greater than with its unequal that birefraction in refractive index, then a n
1Pairing single refraction rate lens are necessary for convex lens; Otherwise, n
oAnd n
ePairing refraction of birefringence lens is necessary for convex lens.Physical location for two lens can be changed front and back, can reach purpose of the present invention.And for polarized light conversion device, clearly, as long as the polarized light that comes out from this device has two kinds of forms under controlled conditions, a kind of liquid crystal arrangement direction that is the polarized light that comes out from polarized light conversion device perpendicular to refraction of birefringence lens, another kind is the liquid crystal arrangement direction that is parallel to refraction of birefringence lens.As for how many degree of rotation is not necessary restriction, if can rotate 270 degree, then with to revolve the effect that turn 90 degrees identical.Minimum unit for control, can divide flexibly, for example can control sub-pixel, also can control a plurality of pixels, other auxiliary material in the lens subassembly such as glass substrate etc. and inessential structure do not play a major role to the solution of the present invention, have or not all not constitute influence enforcement of the present invention, these technological means those of ordinary skills all can adjust flexibly and make up, to realize purpose of the present invention.The orientation process of the material of birefringence of the present invention can be friction orientation, photo orientated, temperature control orientation or automatically controlled orientation.
The image light source that adopts in the present embodiment is a display panel, can be Plasmia indicating panel, display panels, organic light emitting apparatus, field emission apparatus, cathode-ray tube (CRT) or liquid crystal rear-projection.Can certainly adopt other projector equipment, for example adopt convex lens, image is become parallel rays,, then can be directly incident on corresponding polarized light conversion device if the light of projector equipment emission is polarized light in the place ahead of projector equipment; If the light of projector equipment emission is nonpolarized light, then need to transfer nonpolarized light to polarized light with a polaroid or similar device before inciding polarized light conversion device, the liquid crystal arrangement direction in the setting of polarization direction and polarized light conversion device and the lens subassembly is corresponding.Certainly can also select alternate manner of the prior art that light source is provided.Control module among the present invention can be identical with the control module in the TFT LCD of the prior art, can comprise signal-line driving circuit and scan line drive circuit, because the single-point control to pixel in the prior art has been very ripe prior art, just gives unnecessary details no longer one by one here.Though the polarized light conversion device in the embodiments of the invention is the single-point control principle that adopts in the TFT LCD, but can adopt simple whole screen control obviously, realize full frame 2D-3D conversion, ito glass 11a need not be divided into a plurality of unit, but a monoblock adopts a switch and alternating-current pulse power supply just can control full frame 2D-3D conversion.
Utilize such scheme of the present invention, can be easy to realize the conversion of 2D to 3D.And slewing rate is fast, can not produce visual discomfort fully.
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 (10)
1, the convertible 3 d display device of a kind of 2D-3D comprises: the device of image light is provided, it is characterized in that, also comprise polarized light conversion device and lens subassembly;
The described device that image light is provided is used to provide the image light of linear polarization;
Described polarized light conversion device is used for the vertical polarized light in polarization direction when controllable image light the described linear polarization of incident is all or part of not to be rotated direct transmission or be rotated into incident, and the light of outgoing incides described lens subassembly;
Described lens subassembly, comprise single refraction rate lens and refraction of birefringence lens, and described single refraction rate lens and described refraction of birefringence lens constitute compound lens, described two lens include planar section and curvature portion on the other side, the curvature portion of two lens agrees with mutually, this compound lens is to described polarized light conversion device rotation back or do not rotate wherein a kind of convex lens that show as in two kinds of polarized lights of outgoing, and another kind is shown as plano lens.
2, the convertible 3 d display device of a kind of 2D-3D according to claim 1, it is characterized in that, described single refraction rate lens are convex lens, and the refractive index of described single refraction rate lens equals one of them refractive index of described refraction of birefringence lens and greater than the another one refractive index.
3, the convertible 3 d display device of a kind of 2D-3D according to claim 1, it is characterized in that, described refraction of birefringence lens is convex lens, and the refractive index of described single refraction rate lens equals one of them refractive index of described refraction of birefringence lens and less than the another one refractive index.
4, the convertible 3 d display device of a kind of 2D-3D according to claim 2 is characterized in that, the refractive index of described refraction of birefringence lens comprises the ordinary refraction index n with respect to ordinary light
oWith extraordinary ray refractive index n with respect to extraordinary ray
e, the refractive index of described single refraction rate lens equals described ordinary refraction index n
oAnd greater than described extraordinary ray refractive index n
e
5, the convertible 3 d display device of a kind of 2D-3D according to claim 2 is characterized in that, the refractive index of described refraction of birefringence lens comprises the ordinary refraction index n with respect to ordinary light
oWith extraordinary ray refractive index n with respect to extraordinary ray
e, the refractive index of described single refraction rate lens equals described extraordinary ray refractive index n
eAnd greater than described ordinary refraction index n
o
6, the convertible 3 d display device of a kind of 2D-3D according to claim 3 is characterized in that, the refractive index of described refraction of birefringence lens comprises the ordinary refraction index n with respect to ordinary light
oWith extraordinary ray refractive index n with respect to extraordinary ray
e, the refractive index of described single refraction rate lens equals described ordinary refraction index n
oAnd less than described extraordinary ray refractive index n
e
7, the convertible 3 d display device of a kind of 2D-3D according to claim 3 is characterized in that, the refractive index of described refraction of birefringence lens comprises the ordinary refraction index n with respect to ordinary light
oWith extraordinary ray refractive index n with respect to extraordinary ray
e, the refractive index of described single refraction rate lens equals described extraordinary ray refractive index n
eAnd less than described ordinary refraction index n
o
8, according to the convertible 3 d display device of each described a kind of 2D-3D in the claim 1 to 7, it is characterized in that, described polarized light conversion device, comprise: control module, it is dull and stereotyped and all be coated with the liquid crystal layer of oriented layer and transparency electrode successively at opposite first and second surface to have the circuit of thin film transistor (TFT), wherein, transparency electrode on the described first surface is cut at least two, thin film transistor (TFT) in the described circuit flat board is connected with transparency electrode on the described first surface, and described control module and described thin film transistor (TFT) are connected with transparency electrode on the described second surface; Described control module can independently be controlled each transparency electrode on the described first surface and the voltage between the transparency electrode on the described second surface by described thin film transistor (TFT);
When between transparency electrode on the first surface and the transparency electrode on the second surface during no-voltage, the polarization direction that the polarization direction of passing the linearly polarized photon of the liquid crystal layer between the described transparency electrode is rotated to incident the time is vertical; When having predetermined voltage between transparency electrode on the first surface and the transparency electrode on the second surface, the linearly polarized photon that passes does not rotate.
According to the convertible 3 d display device of each described a kind of 2D-3D in the claim 1 to 7, it is characterized in that 9, the described device of image light that provides comprises the display panel that linearly polarized photon can be provided.
10, according to the convertible 3 d display device of each described a kind of 2D-3D in the claim 1 to 7, it is characterized in that, the described device of image light that provides comprises the display panel and the polarizer that nonlinear polarization light is provided, the described polarizer is placed between described display panel and the described polarized light conversion device, and the nonlinear polarization phototransformation that described display panel is sent is a linearly polarized photon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101218117A CN101387758A (en) | 2007-09-14 | 2007-09-14 | 2D-3D convertible stereo display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101218117A CN101387758A (en) | 2007-09-14 | 2007-09-14 | 2D-3D convertible stereo display device |
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|---|---|
| CN101387758A true CN101387758A (en) | 2009-03-18 |
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|---|---|---|---|
| CNA2007101218117A Pending CN101387758A (en) | 2007-09-14 | 2007-09-14 | 2D-3D convertible stereo display device |
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