CN103364961B - Based on the 3 D displaying method of many projected array and multilayer liquid crystal complex modulated - Google Patents
Based on the 3 D displaying method of many projected array and multilayer liquid crystal complex modulated Download PDFInfo
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- CN103364961B CN103364961B CN201310335393.7A CN201310335393A CN103364961B CN 103364961 B CN103364961 B CN 103364961B CN 201310335393 A CN201310335393 A CN 201310335393A CN 103364961 B CN103364961 B CN 103364961B
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Abstract
The invention discloses a kind of three-dimensional display apparatus based on many projected array and multilayer liquid crystal complex modulated, comprise many projected array, cylindrical lens array, diffusing screen, the liquid crystal display layer array arranged successively along light path, and the controller be connected with described many projected array and liquid crystal display layer array.The invention also discloses a kind of 3 D displaying method based on above-mentioned three-dimensional display apparatus.The present invention utilizes the diffusion effect of diffusing screen, makes the shooting angle of backlight be extended to 140 degree, to increase the visible angle of three-dimensional visual field, promotes 3-D display effect; And by many projected array and multilayer liquid crystal display layer, the active-passive composite of three-dimensional image information is modulated, combine traditional Projection Display initiatively modulation system and advantage both liquid crystal display passive modulation mode, increase the three-dimensional information gross information content of system.
Description
Technical field
The present invention relates to dimension display technologies field, particularly a kind of 3 D displaying method based on many projected array and multilayer liquid crystal complex modulated.
Background technology
Along with the development of modern science and technology, the channel of people's obtaining information is enriched constantly, and the quantity of information of acquisition also improves constantly.Compared to other obtain manners, visually-perceptible is considered to again one of people's most important channel obtaining information, and therefore the research of display technique is also more and more subject to the attention of educational circles.Traditional two dimensional surface display is just towards continuous effort of target such as high resolving power, high-contrast, high response speeds, and display effect is more and more true to nature.But the information of two dimension display owing to having lacked a dimension, cause it fundamentally cannot realize stereoscopic visual effect the most true to nature, thus dimension display technologies produces.
Compared to two dimension display, 3-D display can provide more intuitive visual experience, abundanter details, have more the scene of expressive force, can be widely used in many industries, is the development trend of following display technique.At present, dimension display technologies is mainly divided into four classes: stereoscopic dimension display technologies, from stereoscopic dimension display technologies, body dimension display technologies, light field dimension display technologies and hologram three-dimensional display technique etc.
Existing document is (see GordonWetzstein, DouglasLanman, WolfgangHeidrich, RameshRaskar.Layered3D:TomographicImageSynthesisforAtten uation-basedLightFieldandHighDynamicRangeDisplays.ACMTra nsactionsonGraphics, Vol.30, No.4, Article95,2011) 3 D displaying method of a kind of three-dimensional display apparatus based on the modulation of multilayer liquid crystal display layer and spatial light field reconstruct is proposed.This device is modulated backlight by multilayer liquid crystal, by the efficient combination of multilayer liquid crystal display layer pixel transmitance, thus increases quantity of information.
But there are following two point defects in said apparatus: the light source angle of divergence 1, due to liquid crystal panel backlight is less, and cause the field of view angle shown by it narrow and small, three-dimensional scenic imaging effect is not good; 2, backlight panel can only provide the light of single property, does not carry particular color information, and the informational capacity of system is less, expands limited promise.
Summary of the invention
The series of displays effect problems such as the display space field angle that the object of the invention is to overcome prior art is limited, displaying contents quantity of information is limited, propose a kind of multilayer liquid crystal based on many projected array modulation display device and method.
A kind of three-dimensional display apparatus based on many projected array and multilayer liquid crystal complex modulated, comprise many projected array, cylindrical lens array, diffusing screen, the liquid crystal display layer array arranged successively along light path, and the controller be connected with described many projected array and liquid crystal display layer array.
Described many projected array comprise multilayer and are arranged in multiple stage projector on same vertical plane at equal intervals.
Many projected array are made up of at least one projector, and the quantity of projector is determined by system three-dimensional information total amount to display.
Described cylindrical lens array is spliced by multiple cylinder lens cells.
Cylindrical lens array is for compressing projector pixel, and the image of different projector converges to the diverse location on diffusing screen by same cylinder lens cells, laterally just in time splices, and size and the arrangement of cylindrical lens array are determined by many projected array.
There is conjugate relation in projector, cylindrical lens and diffusing screen three.
Described liquid crystal display layer array comprises at least two-layer liquid crystal display layer.
The number of plies of liquid crystal display layer is more, and the gross information content of system is larger, but considers the complicacy of system in actual applications, ensures system compact structure simultaneously, usually selects 2 ~ 5 layers of liquid crystal display layer.
Described diffusing screen adopts the light diffusion material that is made up of light transmissive material and fine granular or the Polymer Dispersed Liquid Crystal flat board (PDLC) for off-position.
Controller is connected with every layer of liquid crystal display layer in liquid crystal display layer array with the every platform projector in many projected array respectively, for carrying out three dimensions description to three-dimensional information, viewpoint and imaging position information calculate the projected image of every platform projector and Pixel Information corresponding to every layer of liquid crystal display layer according to the observation, projected image is sent into respectively corresponding projector, combination of pixels information compound display image is sent into respectively corresponding liquid crystal display layer, as the image source of 3-D display.
On the basis of above-mentioned three-dimensional display apparatus, present invention also offers a kind of 3 D displaying method based on many projected array and multilayer liquid crystal complex modulated, comprise the following steps:
1) the aerial image position of three-dimensional information to display is determined;
2) according to aerial image position with observe viewpoint position, the Pixel Information of corresponding point on diffusing screen and Pixel Information corresponding to each layer liquid crystal display layer is determined;
3) according to step 2) in the Pixel Information of corresponding point is counter on diffusing screen pushes away, determine the projection image information of every platform projector;
4) by step 2) in Pixel Information corresponding to each layer liquid crystal display layer be combined into image and send into corresponding liquid crystal display layer respectively, the composograph in every layer of liquid crystal display layer and step 3) middle projection image information forms the image source of 3-D display jointly;
5) projection image information that every platform projector sends focuses to diffusing screen through cylindrical lens array, through the modulation of multilayer liquid crystal display layer, is then imaged as 3-D view in described aerial image position by diffusing screen diffusion.
Concrete, described step 2) comprising:
A) three-dimensional space description is carried out to three-dimensional information to display;
B) arrive each layer liquid crystal display layer and diffusing screen from observation viewpoint position trace light path by described aerial image position, determine Pixel Information that on diffusing screen, pixel is corresponding and Pixel Information corresponding to every layer of liquid crystal display layer;
C) travel through all observation viewpoint positions and complete optical path-tracing, calculate diffusing screen all Pixel Information of Pixel Information a little and every layer of liquid crystal display layer.
Compared with first technology, major advantage of the present invention is as follows:
1, by the diffusion effect of diffusing screen, make the shooting angle of backlight be extended to 140 degree, to increase the visible angle of three-dimensional visual field, promote 3-D display effect;
2, by many projected array and multilayer liquid crystal display layer, the active-passive composite of three-dimensional image information is modulated, combine traditional Projection Display initiatively modulation system and advantage both liquid crystal display passive modulation mode, increase the three-dimensional information gross information content of system;
3, the projector number in system and the liquid crystal display layer number of plies can increase and decrease according to the requirement of three-dimensional scene information amount, and therefore system has higher expansion.
Accompanying drawing explanation
Fig. 1 is the multilayer liquid crystal modulating three-dimensional display device structure schematic diagram that the present invention is based on many projected array;
Fig. 2 is that the many projected array of the present invention are by cylindrical lens packed pixel schematic diagram;
Fig. 3 is diffusing screen diffusion schematic diagram of the present invention;
Fig. 4 is the light modulation schematic diagram of multilayer liquid crystal display layer array of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described, but should not limit the scope of the invention with this.
As shown in Figure 1, Fig. 1 is the multilayer liquid crystal modulating three-dimensional display device structure schematic diagram that the present invention is based on many projected array, three-dimensional display apparatus of the present invention is furnished with many projected array 1, cylindrical lens array 2, diffusing screen 3, liquid crystal display layer array 7 successively along optical path direction, and is provided with the controller 8 be connected with many projected array 1 and liquid crystal display layer array 7 respectively.Wherein, liquid crystal display layer array 7 is made up of the first liquid crystal display layer 4, second liquid crystal display layer 5, the 3rd liquid crystal display layer 6, and controller 8 passes through to be electrically connected with all projector and liquid crystal display layer.
It should be noted that, many projected array 1 by 1 or more multiple stage projector form, its number determined by the three-dimensional information total amount of concrete system.The arrangement mode of the present embodiment projector adopts multilayer to arrange at equal intervals, but should not limit the scope of the invention with this.
Cylindrical lens array is for compressing projector pixel, and the image of different projector converges to the diverse location on diffusing screen by cylindrical lens array, laterally just in time splices.Cylindrical lens array is spliced by multiple cylinder lens cells, and size and the arrangement of cylinder lens cells are determined by many projected array, as shown in Figure 2.
The present embodiment adopts 3 projector to be that example carries out concrete elaboration to the present invention.Position relationship between many projected array 1, cylindrical lens array 2, diffusing screen 3 as shown in Figure 2, forms conjugate relation between three.Wherein, the projector spacing in many projected array 1 is P, and on diffusing screen 3, pixel size is Q, and the cylindrical lens width therefore in cylindrical lens array 2 is pixel wide sum, i.e. D=3 × Q.
Diffusing screen can adopt the Polymer Dispersed Liquid Crystal flat board (PDLC) of light diffusion material or the off-position be made up of light transmissive material and fine granular, after diffusing screen is projected instrument irradiation, each pixel can regard independently pointolite as, consults Fig. 3.
Liquid crystal display layer array 8 comprises at least 2 layers of liquid crystal display layer, also can be three layers or more layers.The number of plies is more, and the gross information content of system is larger, but considers the complicacy of system in actual applications, ensures system compact structure simultaneously, usually selects 2 ~ 5 layers of liquid crystal display layer.The present embodiment adopts three layers of liquid crystal display layer to be that example carries out concrete elaboration to the present invention.
Controller 7 is connected with every layer of liquid crystal display layer with all projector, by carrying out three dimensions description to three-dimensional information, according to the image space of three-dimensional information in space with observe viewpoint position, determine the colouring information of corresponding point on diffusing screen and Pixel Information corresponding to each layer liquid crystal display layer, thus determine the projected image of every platform projector and the display image of each layer liquid crystal panel, as the image source of 3-D display.
For the three-dimensional display apparatus shown in Fig. 1, a kind of 3 D displaying method based on many projected array and multilayer liquid crystal complex modulated, comprises following steps:
1) the aerial image position of the three-dimensional information that will show is determined;
2) according to the image space of three-dimensional information in space with observe viewpoint position, the Pixel Information of corresponding point on diffusing screen and Pixel Information corresponding to each layer liquid crystal display layer is determined;
Particularly, shown three-dimensional scenic is carried out three-dimensional space description, as shown in Figure 4, imaging position information comprises size and the depth location information of imaging region, determined the respective pixel of every layer of liquid crystal display layer respective pixel and diffusing screen by three-dimensional scenic image space A from observation vision point 1 trace light path, be designated as LP1, LP2, LP3, PRO, then this observation vision point 1 watches the information L (V1 of image space A, P) to be multiplied decision by the transmitance information of every layer of liquid crystal display layer respective pixel, be designated as L (V1, P)=LP1 × LP2 × LP3 × PRO, the information getting method that this observation vision point 1 observes other image spaces (as B) is in like manner known, in like manner known too for the information getting method observing vision point 2, V3 observes image space A, B, repeat no more here.
Travel through all observation viewpoint positions and complete optical path-tracing, following relational expression can be obtained:
L＝PRO×L1×L2×L3
PRO, L1, L2 and L3 in above formula correspond respectively to many projected array, the first liquid crystal display layer, the second liquid crystal display layer and the 3rd liquid crystal display layer and correspond to the modulation matrix of light path and represent, L corresponds to the matrix representation of the 3-D view of observation place, place.Controller 7 calculates every layer of all Pixel Information of liquid crystal display layer according to the imaging position information of system, solves corresponding modulation matrix PRO, L1, L2 and L3.
3) according to step 2) in the Pixel Information of corresponding point is counter on diffusing screen pushes away, determine the projection image information of every platform projector;
4) by step 2) in Pixel Information corresponding to each layer liquid crystal display layer be combined into image and send into corresponding liquid crystal display layer respectively, the composograph in every layer of liquid crystal display layer and step 3) middle projection image information forms the image source of 3-D display jointly;
5) projection image information that every platform projector sends focuses to diffusing screen through cylindrical lens array, through the modulation of multilayer liquid crystal display layer, is then imaged as 3-D view in described aerial image position by diffusing screen diffusion.
Although be that the present invention is described further by the mode illustrated and illustrate here; but should be realized that; the present invention is not limited to the above-described embodiment and examples; description above is only considered to illustrative; and it is nonrestrictive; those skilled in the art can make multiple conversion or amendment, as long as no leaving the scope and spirit essence of establishing in claims, are all considered as within protection scope of the present invention.
Claims (6)
1. the 3 D displaying method based on many projected array and multilayer liquid crystal complex modulated, the three-dimensional display apparatus adopted comprises many projected array, cylindrical lens array, diffusing screen, the liquid crystal display layer array arranged successively along light path, and the controller be connected with described many projected array and liquid crystal display layer array; And described liquid crystal display layer array comprises at least two-layer liquid crystal display layer; It is characterized in that, described 3 D displaying method comprises the following steps:
1) the aerial image position of three-dimensional information to display is determined;
2) according to aerial image position with observe viewpoint position, the Pixel Information of corresponding point on diffusing screen and Pixel Information corresponding to each layer liquid crystal display layer is determined;
3) according to step 2) in the Pixel Information of corresponding point is counter on diffusing screen pushes away, determine the projection image information of every platform projector;
4) by step 2) in Pixel Information corresponding to each layer liquid crystal display layer be combined into image and send into corresponding liquid crystal display layer respectively, the composograph in every layer of liquid crystal display layer and step 3) middle projection image information forms the image source of 3-D display jointly;
5) projection image information that every platform projector sends focuses to diffusing screen through cylindrical lens array, through the modulation of multilayer liquid crystal display layer, is then imaged as 3-D view in described aerial image position by diffusing screen diffusion.
2., as claimed in claim 1 based on the 3 D displaying method of many projected array and multilayer liquid crystal complex modulated, it is characterized in that, described step 2) comprising:
A) three-dimensional space description is carried out to three-dimensional information to display;
B) arrive each layer liquid crystal display layer and diffusing screen from observation viewpoint position trace light path by described aerial image position, determine Pixel Information that on diffusing screen, pixel is corresponding and Pixel Information corresponding to every layer of liquid crystal display layer;
C) travel through all observation viewpoint positions and complete optical path-tracing, calculate diffusing screen all Pixel Information of Pixel Information a little and every layer of liquid crystal display layer.
3. as claimed in claim 1 based on the 3 D displaying method of many projected array and multilayer liquid crystal complex modulated, it is characterized in that, described many projected array comprise multilayer and are arranged in multiple stage projector on same vertical plane at equal intervals.
4., as claimed in claim 1 based on the 3 D displaying method of many projected array and multilayer liquid crystal complex modulated, it is characterized in that, described cylindrical lens array is spliced by multiple cylinder lens cells.
5., as claimed in claim 1 based on the 3 D displaying method of many projected array and multilayer liquid crystal complex modulated, it is characterized in that, described liquid crystal display layer is 2 ~ 5 layers.
6. as claimed in claim 1 based on the 3 D displaying method of many projected array and multilayer liquid crystal complex modulated, it is characterized in that, described diffusing screen adopt the light diffusion material that is made up of light transmissive material and fine granular or for the Polymer Dispersed Liquid Crystal of off-position dull and stereotyped.
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| CN104317120A (en) * | 2014-10-27 | 2015-01-28 | 中国科学院自动化研究所 | Free-viewpoint true three-dimensional display method and free-viewpoint true three-dimensional display system allowing many people to watch |
| CN110914748B (en) * | 2017-07-18 | 2022-09-16 | 成都极视元科技有限公司 | Method for time-sharing restoring of optical field by using lens |
| CN109119007A (en) * | 2018-09-17 | 2019-01-01 | 北京唐冠天朗科技开发有限公司 | A kind of product multidimensional display systems and method and application |
| CN109946916B (en) * | 2019-04-25 | 2020-11-10 | 合肥工业大学 | Projection light field display device and display method based on multilayer transparent scattering screen |
| CN111025329A (en) * | 2019-12-12 | 2020-04-17 | 深圳奥比中光科技有限公司 | Depth camera based on flight time and three-dimensional imaging method |
| CN111818324A (en) * | 2020-05-26 | 2020-10-23 | 北京邮电大学 | Device and method for generating three-dimensional large-visual-angle light field |
| CN114425985A (en) * | 2022-02-28 | 2022-05-03 | 河南嘉晨智能控制股份有限公司 | Vehicle warning sign and device |
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