CN103176308B - Based on full resolution free stereo display equipment and the method for liquid crystal prism array - Google Patents

Based on full resolution free stereo display equipment and the method for liquid crystal prism array Download PDF

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Publication number
CN103176308B
CN103176308B CN201310116207.0A CN201310116207A CN103176308B CN 103176308 B CN103176308 B CN 103176308B CN 201310116207 A CN201310116207 A CN 201310116207A CN 103176308 B CN103176308 B CN 103176308B
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China
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liquid crystal
prism array
backlight
crystal prism
lcds
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CN201310116207.0A
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Chinese (zh)
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CN103176308A (en
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陆建钢
谈健
王祎君
倪水彬
刘诗雨
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上海交通大学
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Abstract

The invention discloses a kind of full resolution free stereo display equipment based on liquid crystal prism array and method, it comprises backlight, LCDs, liquid crystal prism array and isochronous controller; Described backlight, LCDs, liquid crystal prism array are placed from the bottom to top successively, and described isochronous controller is connected by signal wire with described backlight, LCDs, liquid crystal prism array respectively.Full resolution free stereo display equipment based on liquid crystal prism array of the present invention and method adopt time-multiplexed working method, by the Rapid Variable Design of refractive index in the quick switching of LCDs epigraph and liquid crystal prism array, the image of different points of view can be shown in the multiple visual fields in viewing space; The multi-electrode driving design of liquid crystal prism array, the working method of backlight pulsed, reduces 35.2% by the dynamic crosstalk between different visual field, effectively improves the viewing effect of 3-D display.

Description

Based on full resolution free stereo display equipment and the method for liquid crystal prism array

Technical field

The present invention relates to free 3 D display technology, particularly, relate to a kind of full resolution free stereo display equipment based on liquid crystal prism array and method.

Background technology

Stereo display is widely used in dimension display technologies.Stereo display utilizes the parallax of about human body two to make beholder obtain depth perception.And stereo display technique popular at present, needs can be divided into wear the stereo display of point optical glasses and the free 3 D display technology of direct viewing.Free 3 D display technology is all widely used in a lot of field, as: military affairs, medical treatment, amusement, education, advertisement and data visualization etc.It is the important topic in current display technique field.

Cylindrical lens formula (Lenticular sheets) 3-D technology is a kind of free 3 D display technology conventional at present.It makes the image of each viewpoint arrive different visual fields by solid-state cylindrical lens array.Wherein, cylindrical lens is placed on the front side of LCDs.Backlight provides back light, the corresponding region of LCDs shows the image of different points of view, and these is at the cylindrical lens of image through corresponding region of zones of different, project the different visual fields before screen.Two, the left and right of beholder is in different visual fields, thus receives different images, thus produces parallax, and beholder can obtain 3-D effect.

Cylindrical lens formula dimension display technologies makes beholder obtain 3-D effect by the picture deflection of correspondence is projected corresponding visual field, has the advantage that brightness is unattenuated.But owing to the image in whole LCDs have been split into the part of multiple viewpoint, spatial resolution has declined greatly, and picture quality also weakens thereupon.Therefore, the picture quality how improving cylindrical lens formula dimension display technologies is an important topic.

Summary of the invention

Because the above-mentioned defect of prior art, technical matters to be solved by this invention is to provide a kind of full resolution free stereo display equipment based on liquid crystal prism array and method, it utilizes the automatically controlled characteristic of liquid crystal, respectively the image projection of different points of view is realized the Auto-stereo display of high-quality full resolution by the liquid crystal prism array presenting different refractivity distribution at Different periods to corresponding visual field.

For achieving the above object, the present invention proposes a kind of full resolution free stereo display equipment based on liquid crystal prism array, it comprises backlight, LCDs, liquid crystal prism array and isochronous controller; Described backlight, LCDs, liquid crystal prism array are placed from the bottom to top successively, and described isochronous controller is connected by signal wire with described backlight, LCDs, liquid crystal prism array respectively.

Described above based on the full resolution free stereo display equipment of liquid crystal prism array, wherein, described liquid crystal prism array is followed successively by glass substrate, ITO electrode, liquid crystal layer, top alignment films, common electrode and glass substrate from top to bottom.

Further, described above based on the full resolution free stereo display equipment of liquid crystal prism array, wherein, described liquid crystal prism array, single pixel driver is carried out by many ITO electrode, apply vertical electric field at liquid crystal layer, make the index distribution of liquid crystal layer be rendered as the pattern of prism, thus the image of current view point is correctly projected corresponding visual field.

Described above based on the full resolution free stereo display equipment of liquid crystal prism array, wherein, in described liquid crystal prism array, electrode width is W1, and electrode separation is W2, is N for single pixel electrode number, and single pixel wide degree is N* (W1+W1).

Described above based on the full resolution free stereo display equipment of liquid crystal prism array, wherein, by the orientation of liquid crystal prism array base palte is made liquid crystal molecular orientation and LCDs in liquid crystal prism array to go out light polarization direction consistent.

Described above based on the full resolution free stereo display equipment of liquid crystal prism array, wherein, described backlight adopts collimated backlight and works in a pulsed fashion; In the incipient stage of single frames display, close backlight, in liquid crystal array stationary phase, open backlight.

Further, described above based on the full resolution free stereo display equipment of liquid crystal prism array, wherein, 1/4th cycles that the pulse mode of described backlight starts at every frame close backlight, open backlight show in the cycle of 3/4ths subsequently.

Described above based on the full resolution free stereo display equipment of liquid crystal prism array, wherein, described isochronous controller is used for the pulse sequence of adjusted in concert backlight, the image switching of LCDs and the rapid translating of liquid crystal prism array pattern, correctly to project respective field of vision by corresponding visual point image.

Meanwhile, present invention also offers a kind of display packing of the full resolution free stereo display equipment based on above-mentioned liquid crystal prism array, in procedure for displaying, adopt following steps:

In the incipient stage of a frame, described backlight closes backlight, and described LCDs presents the modulation for a visual point image, and now, described liquid crystal prism layer starts to set up prism pattern, and along with the time is more and more close to desirable prism;

After Time Created is spent, described backlight is started working, now the image of described this viewpoint of liquid crystal display screen display, and this visual point image, close to desirable prism, projects in corresponding visual field by described liquid crystal prism array more exactly;

After a frame time, a whole set of display device will provide respective image for next visual field, at switch instant, first, described backlight closes light source, described LCDs is converted to the image required for new viewpoint, correspondingly, electrode on described liquid crystal prism array is instantaneous changes into the new driving voltage required for prism pattern, and described liquid crystal prism array starts the pattern being transitioned into current view point from the pattern of a upper viewpoint; Then the pattern of described liquid crystal prism array is basicly stable, and described backlight restarts work, and the image of described liquid crystal display screen display current view point, described liquid crystal prism array projects image onto corresponding visual field.

Therefore, full resolution free stereo display equipment based on liquid crystal prism array of the present invention and method adopt time-multiplexed working method, by the Rapid Variable Design of refractive index in the quick switching of LCDs epigraph and liquid crystal prism array, the image of different points of view can be shown in the multiple visual fields in viewing space; The multi-electrode driving design of liquid crystal prism array, the working method of backlight pulsed, reduces 35.2% by the dynamic crosstalk between different visual field, effectively improves the viewing effect of 3-D display.

Accompanying drawing explanation

Fig. 1 is the structural drawing of the full resolution free stereo display equipment based on liquid crystal prism array of the present invention;

Fig. 2 is the structural representation of liquid crystal prism layer in the present invention;

Fig. 3 (a) is in the present invention, and at the first half of single sequential, single image is projected the schematic diagram of partial field of view in space by a whole set of display device;

Fig. 3 (b) is in the present invention, and at the latter half of single sequential, single image is projected the schematic diagram of remainder visual field in space by a whole set of display device;

Fig. 4 is the work schedule schematic diagram of backlight, liquid crystal display and liquid crystal prism array in the present invention.

Embodiment

Below with reference to accompanying drawing, the technique effect of device structure of the present invention and generation and display packing are described further, to understand object of the present invention, characteristic sum effect fully

As shown in Figure 1, by backlight, LCDs, liquid crystal prism array and isochronous controller form the one-piece construction of the full resolution free stereo display equipment based on liquid crystal prism array of the present invention.Wherein, backlight is positioned over the bottom of whole display device, adopts the form of the collimated back of low divergence to provide backlight.LCDs is positioned over the top of backlight.Liquid crystal prism array is placed on the top of display device, three part of module seamless links.Isochronous controller is used for controlling backlight by signal wire, and LCDs and liquid crystal prism layer duty make it to mate normal display.

Wherein, in liquid crystal prism array, electrode width is W1, and electrode separation is W2, is N for single pixel electrode number, then single pixel wide degree is N* (W1+W1).By liquid crystal prism array base palte orientation (Rubbing) is made liquid crystal molecular orientation and LCDs in liquid crystal prism array to go out light polarization direction consistent.

Backlight adopts collimated backlight and works in a pulsed fashion; In the incipient stage of single frames display, close backlight, in liquid crystal array stationary phase, open backlight.Particularly, 1/4th cycles that the pulse mode of backlight starts at every frame close backlight, open backlight show in the cycle of 3/4ths subsequently.

Wherein, the structure of the most key in the present invention liquid crystal prism array as shown in Figure 2.The present invention adopts the mode of upper and lower electric field to drive liquid crystal prism array, wherein, is ITO electrode in 25, and 24 is the liquid crystal layer responded fast, and 22 is common electrode, and 21,26 is glass substrate, and 23 is top alignment films.Institute's making alive and electrode configuration parameter all through optimizing, make the pattern of liquid crystal prism array closer to desirable prism.

Wherein, liquid crystal prism array carries out single pixel driver by many ITO electrode, applies vertical electric field at liquid crystal layer 24, makes the index distribution of liquid crystal layer 24 be rendered as the pattern of prism, thus the image of current view point is correctly projected corresponding visual field.

Hereafter by by Fig. 3 and Fig. 4, the working method of the full resolution free stereo display equipment based on liquid crystal prism array of the present invention is described further.As shown in Figure 3 (a), 31 is backlight, and 32 is LCDs, and 33 is liquid crystal prism array.In Fig. 3 (a), provide collimated backlight by the backlight 31 being arranged on bottom.Light is modulated through being placed on middle LCDs 32, shows the single image in a frame.Corresponding a part of visual field is projected image onto finally by the liquid crystal prism array 33 being placed on the superiors.And in Fig. 3 (b), similarly, the backlight of bottom provides collimated backlight, LCDs modulation backlight shows the image of another viewpoint in a frame.Correspondingly, liquid crystal prism array projects image onto other corresponding visual fields.Utilize time-multiplexed mode, by the quick switching of LCDs epigraph and the Rapid Variable Design of liquid crystal prism refractive index, the full resolution free stereo display equipment based on liquid crystal prism array of the present invention can at the image watching the multiple visual fields display different points of view in space.About when beholder watches, two are in different visual field, and rely on human visual to persist effect, eyes receive the image that two width exist parallax, thus make beholder obtain 3-D display effect.

In order to realize the Auto-stereo display of low crosstalk, liquid crystal prism array must exactly by the image projection in LCDs to corresponding visual field.The work schedule of the backlight in the present invention, LCDs and liquid crystal prism array adopts the method for pulse operation to carry out work, specifically as shown in Figure 4.41 is liquid crystal prism array operation sequence, and 42 is LCDs work sequence, and 43 is backlight work sequence.In procedure for displaying, in the incipient stage of a frame, backlight closes backlight, and LCDs presents the modulation for a visual point image.Now, liquid crystal prism layer starts to set up prism pattern, and along with the time is more and more close to desirable prism.After Time Created is spent, backlight is started working, the image of this viewpoint of now liquid crystal display screen display, and this visual point image, close to desirable prism, can project in corresponding visual field by liquid crystal prism array more exactly.After a frame time, a whole set of display device will provide respective image for next visual field.At switch instant, first, backlight closes light source, LCDs is converted to the image required for new viewpoint.Correspondingly, the electrode on liquid crystal prism array is instantaneous changes into the new driving voltage required for prism pattern, and liquid crystal prism array starts the pattern being transitioned into current view point from the pattern of a upper viewpoint; Then the pattern of liquid crystal prism array is basicly stable, and backlight restarts work, and the image of liquid crystal display screen display current view point, liquid crystal prism array projects image onto corresponding visual field.So, by the switching simultaneously and rapidly of backlight, LCDs and liquid crystal prism array, in viewing areas each visual field display correspondence image, beholder is allowed to watch free stereo image.And the pulse operation of backlight, make the full resolution free stereo display equipment based on liquid crystal prism array of the present invention weaken the larger crosstalk brought when liquid crystal prism array switch operating state.Under the mode not using pulsed backlight, dynamic crosstalk is about 18.59%.Through optimizing, the present invention selected to close backlight in 1/4th cycles that a frame starts, in 3/4ths cycles subsequently, open backlight show, this mode makes dynamic crosstalk during viewing for reducing 35.2%, thus achieves the full resolution Auto-stereo display of low crosstalk.

More than describe preferred embodiment of the present invention in detail.Should be appreciated that the ordinary skill of this area just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technician in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.

Claims (6)

1. based on a full resolution free stereo display equipment for liquid crystal prism array, it is characterized in that, comprise backlight, LCDs, liquid crystal prism array and isochronous controller; Described backlight, LCDs, liquid crystal prism array are placed from the bottom to top successively, and described isochronous controller is connected by signal wire with described backlight, LCDs, liquid crystal prism array respectively;
Described liquid crystal prism array is followed successively by glass substrate, ITO electrode, liquid crystal layer, top alignment films, common electrode and glass substrate from top to bottom;
Described backlight adopts collimated backlight and works in a pulsed fashion; 1/4th cycles that the pulse mode of described backlight starts at every frame close backlight, open backlight show in the cycle of 3/4ths subsequently.
2. as claimed in claim 1 based on the full resolution free stereo display equipment of liquid crystal prism array, it is characterized in that, described liquid crystal prism array, single pixel driver is carried out by many ITO electrode, vertical electric field is applied at liquid crystal layer, make the index distribution of liquid crystal layer be rendered as the pattern of prism, thus the image of current view point is correctly projected corresponding visual field.
3. as claimed in claim 1 based on the full resolution free stereo display equipment of liquid crystal prism array, it is characterized in that, in described liquid crystal prism array, electrode width is W1, and electrode separation is W2, be N for single pixel electrode number, and single pixel wide degree is N* (W1+W1).
4. as claimed in claim 1 based on the full resolution free stereo display equipment of liquid crystal prism array, it is characterized in that, by the orientation of liquid crystal prism array base palte is made the liquid crystal molecular orientation in described liquid crystal prism array and LCDs to go out light polarization direction consistent.
5. as claimed in claim 1 based on the full resolution free stereo display equipment of liquid crystal prism array, it is characterized in that, described isochronous controller is used for the pulse sequence of adjusted in concert backlight, the image switching of LCDs and the rapid translating of liquid crystal prism array pattern, correctly to project respective field of vision by corresponding visual point image.
6. the display packing of the full resolution free stereo display equipment based on liquid crystal prism array as described in one of claim 1-5, is characterized in that, in procedure for displaying, adopt following steps:
In the incipient stage of a frame, described backlight closes backlight, and described LCDs presents the modulation for a visual point image, and now, described liquid crystal prism layer starts to set up prism pattern, and along with the time is more and more close to desirable prism;
After Time Created is spent, described backlight is started working, now the image of described this viewpoint of liquid crystal display screen display, and this visual point image, close to desirable prism, projects in corresponding visual field by described liquid crystal prism array more exactly;
After a frame time, a whole set of display device will provide respective image for next visual field, at switch instant, first, described backlight closes light source, described LCDs is converted to the image required for new viewpoint, correspondingly, electrode on described liquid crystal prism array is instantaneous changes into the new driving voltage required for prism pattern, and described liquid crystal prism array starts the pattern being transitioned into current view point from the pattern of a upper viewpoint; Then the pattern of described liquid crystal prism array is basicly stable, and described backlight restarts work, and the image of described liquid crystal display screen display current view point, described liquid crystal prism array projects image onto corresponding visual field.
CN201310116207.0A 2013-04-03 2013-04-03 Based on full resolution free stereo display equipment and the method for liquid crystal prism array CN103176308B (en)

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CN105511179B (en) * 2016-03-03 2020-02-18 京东方科技集团股份有限公司 Liquid crystal display
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