CN101129074A - Method and device for tracking sweet spots - Google Patents
Method and device for tracking sweet spots Download PDFInfo
- Publication number
- CN101129074A CN101129074A CNA2006800061738A CN200680006173A CN101129074A CN 101129074 A CN101129074 A CN 101129074A CN A2006800061738 A CNA2006800061738 A CN A2006800061738A CN 200680006173 A CN200680006173 A CN 200680006173A CN 101129074 A CN101129074 A CN 101129074A
- Authority
- CN
- China
- Prior art keywords
- illumination
- observer
- optimum position
- illumination component
- reference point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/366—Image reproducers using viewer tracking
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
- H04N13/32—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays using arrays of controllable light sources; using moving apertures or moving light sources
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Liquid Crystal (AREA)
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
Abstract
The method involves determining an eye position of a display observer by a control unit using inverse ray analysis, and providing an address data for activating illumination units to prepare defined sweet spots (5) from the position data. Optical component is used in a path of rays for the analysis. The control unit detects and considers a defined angle of a diffractive unit in a preset angular range and an observer viewing angle. An independent claim is also included for a device for controlling a sweet spot unit for a display with an image matrix and pixels.
Description
The present invention relates to a kind of method and apparatus of optimum position of the transmitted electron display sweet spot unit that is used for tracing display information, described method and apparatus projects light on the eyes of at least one observer on the optimum position by display in the mode of orientation behind modulation intelligence.
The present invention can be used for one or more observers' monoscopic and/or automatic stereoscopic display device.According to display unit of the present invention image is selectively shown with two dimension, three dimensional pattern or mixed mode.In presents, a kind of display unit represented in term " automatic stereoscopic display device ", utilizes this display unit, and at least one observer need not any extra just assisting can watch 3-D view by its position of freely selecting from a lot of.
The side that propagates from light looks up, and the sweet spot unit of display comprises an illumination matrix that has a plurality of emissions or transmit the illumination original paper of light, and the imaging device with imaging original paper.The light of the illumination original paper that imaging device is opened illumination array, projects at least one observer's the eyes with similar desirable collimated light beam in the mode of one or more optimum positions.For this reason, a plurality of illumination components are distributed to each image-forming component of imaging device.The optimum position is the zone of the information that can high-quality observed information panel be provided.
In the uniformity of the information that shows on the guarantee information panel on the optimum position always, and when watching three-dimensional content, must prevent that the information between observer's the eyes from crosstalking.If the observer changes its position in the space in display unit the place ahead, these conditions must continue to reach, to provide high-quality monoscopic or stereoscopic image content to the observer continuously.For example, being used for the monoscopic display of vehicle, can watch film passenger when the driver provides route map.Two people should move within the specific limits and not lose its information specific.
In addition, verified, slight too small or excessive if the quantity of light source of opening for the optimum position of determining only has, disturb so and image defects will occur probably.For example, the observer may experience crosstalking between each optimum position, and such as the deterioration of image of the uniformity and contrast.Human eye can be awared this variation easily.
People expect that automatic stereoscopic display device presents high-quality three-dimensional scenic, and show and feature that observer's quantity is irrelevant, for example observer's freedom, discrete moving, and the selectable path that obtains a plurality of figure under two dimension and/or the three dimensional pattern.
In order to satisfy all these demands as far as possible, just need a suitable tracking system, its subsequent processes and steric information display for tracking means provides information.This tracking system must constantly detect the observer big as far as possible in display unit the place ahead watch moving in the space, so that the specific image information of location independent actual with it to be provided all the time to each observer.This has just proposed high requirement to the precision of position detector, the quality and the overall image quality of display of display discrete component.
The existing tracking system that is used to follow the tracks of of utilizing machinery, optics and other mode or its combination.But, the shortcoming that precision is born by these systems or the adaptability used in real time is adversely affected.Their design is often bulky, and can watch the space very limited to what the observer provided information.In addition, increased required computing time to provide quite a lot ofly and needed the factor considered in the process in position probing to information.
WO 03/053072A1 patent application document discloses a kind of the have tracking system of collection three dimensional local information and the multiple user display of continuous stereo image shows.This display comprise be arranged in order can three-dimensional addressing backlight, be used for light focusing in observer's large tracts of land imaging len and as the optical modulator of image array.Backlightly be made up of a plurality of two-dimension light source arrays, this two-dimension light source array is arranged in a plurality of planes successively one by one.One illumination component in the array of source backlight person's physical location according to the observation decides its unlatching.This method also can make light source respectively the distance between one or more observers and the display be followed the tracks of.The three dimensional local information of all observer's eyes of detection of dynamic is opened distributed illumination component backlight, the image of light beam and modulation is focused to simultaneously each left side/right eye of observer.
The shortcoming of this display is low-light level, because an entire image that can the local point-source of light of selecting can be used for illuminating each observer's eye is only arranged, but also because does not open the part that array of source has absorbed this light in the light path.Except its huge volume, the manufacturing backlight of this three-dimensional is difficulty also.
No. 6014164 patent disclosures of US a kind of automatic stereoscopic display device that is used for a plurality of observers with light source tracking system.The light source that each observer is arranged in pairs can move on x, y and z direction, with the variation of tracing observation person position under the help of control system.This method can continuously provide three-dimensional scenic to the observer on information panel.Because this system has also used the light source tracking method, so above-mentioned shortcoming equally also appears in this system.Specifically, since right to the specific light source of the necessary tracing observation person separately of each observer, so need expensive tracking means.These devices do not allow display unit to realize planar design.
Known tracking only can be broadcasted information specific to the observer who is arranged on the stereos copic viewing space diverse location that is quite restricted.The brightness of following range and image array is restricted.In addition, display is bulky, needs expensive device, comprises that calculation element realizes following the tracks of.The observer who is positioned on the diverse location of display the place ahead is many more, and the data volume that calculate is just big more, thereby the delay between actual the providing of position probing and optimum position will increase more.Therefore, formed general convention, i.e. real-time some part of calculated data not, but with precalculated storage in look-up table, search and handle these data when needed.Another shortcoming is that the memory capacity of this system will be used up when the observer increases very soon.
An object of the present invention is to prevent or reduce the shortcoming of above-mentioned known technology by means of backlight line back tracking method.Backlight line back tracking method used herein is determined the propagation of light based on the geometrical arrangements of optical module.It utilizes the reversible light characteristic of light path, thereby all light can be from the eyes traceback to its originating point.
Specifically, an object of the present invention is to provide display with sweet spot unit, this display has such ability, promptly in the bigger variation of person position according to the observation in the space of watching, fast on-mechanical is followed the tracks of the optimum position of having expanded, and in image array, transmit observer's specific image information to single optimal position area, keep the continuous high image quality and the even illumination of information panel simultaneously.
Simultaneously, increase following range, the specific image of each observer is removed crosstalked.In addition, when guaranteeing acceptable computation time, reduce the data volume that tracking will calculate in real time, and the precalculated data volume that is stored in the look-up table also keeps low as far as possible.
Known fact is, the scattering of optical module and diffraction maximum ground influence picture quality in the light path, thereby and influences the even illumination of optimum position.Select some optical module causing scattering and diffraction on level or the vertical plane or on all planes.On purpose use scattering and diffraction instrument, can further improve the quality of illumination uniformity and optimum position, if the structure very thin of illumination component particularly.
This purpose is solved in the mode of a kind of tracking based on the display that is used for having sweet spot unit and image array of the present invention, in its a plurality of treatment steps, begin with the locus of detecting observer's eyes by position detector, illumination component in real time, wherein illumination component is arranged in the pattern of rule in the illumination matrix, and in optical path, open, in order to definite optimum position to be provided to the observer.
According to the present invention, this purpose is solved by a kind of tracking, and this tracking comprises the tracking of backlight line, therein, follows the trail of the light that arrives the illumination matrix from observer's eyes by image array and imaging device.This illumination component that makes those observers see through the illumination matrix that can see when image array is watched is accurately opened.Combine with imaging device, but irrelevant with the type of used imaging device, observer's eyes receive the directional lighting of distributing to them in the optimum position.
Be consecutively detected by means of position detector after at least one observer's the locus of eyes, detected positional information sent to carry out the control unit that the backlight line is followed the trail of.Depend on the precision of position detector and/or the distance between other parameter, particularly observer's eyes and the display, in discrete step, in control unit, form the geometry of required optimum position by definite reference point.Number and position to the reference point of each observer's eye can freely be selected.Among the present invention, the square arrangement of first-selected reference point that is to say, is being preferably formed as execution backlight line tracking at least four points of rectangle.
The number of reference point must be enough big, so that optimum position evenly illumination all the time, but also enough little, so that required computing capability and memory capacity are low as far as possible.If the observer for example is positioned at apart from the relative position far away of display, the scope of optimum position just must become greatly so, thereby the precision of position probing significantly reduces.
Control unit is carried out the backlight line and is followed the trail of, the pixel of determining in being arranged in the image array grid and by at least one parameter from each reference point.Preferably all pixels are not all carried out calculating, calculate but only the pixel that is arranged in row is carried out, it just can only be determined by a parameter according to given image array grid like this.
The backlight line is followed the trail of from pixel by imaging device until illumination component.Calculate to produce the data record with this illumination component address information, this address information projects separately reference point by the respective imaging device.In ensuing treatment step, generate the illumination component pattern that will open based on address information, described pattern by imaging device to of the mode imaging of each observer's eye with above-mentioned optimum position.
The method according to this invention all can be used the monoscopic and the automatic stereoscopic display device that are used at least one observer.
Although the backlight line of each pixel is followed the trail of preferably the central series executed in real time of image array, control unit is stored in the look-up table in order to search the precalculated data record of illumination component address information for other opticpath searching.Address information corresponding to the illumination component pattern of current observer position is searched by the mode of comparing data record by control unit, and be used to generate corresponding optimum position, wherein visual angle α determines the opticpath of watching pixel from the reference point to the image array.During each pixel from the grid of image array is stored in data record in the look-up table to the precalculated opticpath of light of the illumination component of each illumination matrix.
By imaging device cause not normal, image field curvature for example is preferably in the data record and takes in.Equally also to consider the temperature effect characteristic of well known materials and foozle and used optical element.
A parameter using the visual angle to follow the trail of as the backlight line has its advantage, that is exactly the amount that can reduce the calculating that will carry out, because some visual angle not only can be used and an observer who is positioned at the preceding certain distance of display, can also be used to be positioned at a plurality of observers of different distance.If provide identical stereo-picture to all observers, then address information preferably only comprises two sequences of separating of illumination component, and it is respectively applied for the position of all left eyes of detected observer and right eye.Look-up table comprises a plurality of precalculated light and visual angle, and it is used to the related pixel of image array and all illumination components of illumination matrix to generate the optimum position.The translation data of the whole expression of these data record look-up table.
One embodiment of the present of invention comprise the illumination matrix of being made up of light valve (shutter), and wherein this light valve has the discrete controlled sub-pixel of the directional backlight of being combined with.Selectively, the illumination matrix can comprise discrete controlled luminous lighting element, for example LEDs or OLEDs, thereby remove unnecessary backlight, the planar design that keeps display.
In addition, the present invention relates to a kind of being used for provides the device of control signal at display for the tracking of the optimum position of sweet spot unit, and it comprises suitable control and storage device, to realize the method according to this invention.
According to another embodiment of the present invention, in light path, used at least one additional optical components of scattering or diffraction element form, had an additional parameter that is used to search address information and improves image quality and illumination uniformity why thereby Here it is.Control unit also detects and considers angle θ (in angular range), and it determines the optical characteristics of scattering or diffraction instrument.
Angle θ is the angle of scattering that comprises the scattering device of at least one dispersing element, or comprises the angle of diffraction of the diffraction instrument of at least one diffraction element.
Because need a plurality of light to generate the optimum position, so there are a plurality of angular ranges relevant to be used for calculating with angle [alpha].Control unit preferably detects these angular ranges according to the size of the actual illumination matrix grid that uses.Simple in order to keep calculating, angular range information does not rely on scattering or the position of diffraction instrument in light path and detects and consider, but is in all the time on the position that can touch in the backlight line tracing process.In order to generate definite optimum position, open the illumination component of all illumination matrixes of in backlight line tracing process, finding out.
Because according to having considered scattering or diffraction instrument in the backlight line tracing process of the present invention, the fill light element will be opened in simple mode.This further reduce or even eliminated image deflects, for example blanking bar, crosstalk and lack contrast.
According to the method that is used for the optimum position of tracking sweet spots unit of the present invention, make the amount that reduces to be stored in the translation data in the look-up table and become possibility required computing time.Especially, if under two dimension and/or three dimensional pattern, provide different information simultaneously, even the best also specific image information of high-quality tracing observation person in real time when the observer changes its position in watching the space to indivedual observers.
Now, will be elaborated to the method according to this invention and corresponding device thereof.Among the figure
Fig. 1 be schematically show have sweet spot unit, the vertical view of the multiple user display of the observer's eyes 6 in image array 4 and the optimum position 5,
Fig. 2 is the vertical view of expression light, and this light is with the reference point P of corresponding viewing angle α from the optimum position
1To P
4Set out, arrive the pixel D of image array 4
pAnd D
r,
Fig. 3 a represents the sequence 7 of illumination component, and it forms the pattern M of illumination component LE,
Fig. 3 b represents to have the details of unlatching and the illumination matrix 1 of the illumination component LE that does not open
Fig. 4 is the light RT of expression along backlight line tracing process
iVertical view, described light is by the angular range scattering of scattering device SF with ± θ, the light portion RT of scattering
I0To RT
I3Invest illumination component LE, and
Fig. 5 is the flow chart of backlight line tracing program in the expression display unit.
Illustrate best with reference to automatic stereoscopic display device.
Now, in conjunction with automatic stereoscopic display device, and referring to figs. 1 through 5, if to being used for one or more observers when observation space changes its position according to of the present invention, the method and the corresponding device thereof of optimum position, tracking sweet spots unit 5 are described in detail.This method is based on such thought, that is: in order to generate the optimum position, provide with desirable brightness and uniformity stereoscopic images displayed in this optimum position and keep high image quality, for each observer's position, only opens those illumination components LE.Purpose of the present invention is achieved by means of backlight line back tracking method and corresponding device thereof.
With reference to Fig. 1, automatic stereoscopic display device comprises following primary clustering: sweet spot unit and imaging device, wherein sweet spot unit comprises and has illumination component LE
0nTo LE
Qk Illumination matrix 1, imaging device comprises lens 2 and Fresnel (Fresnel) lens 3.Has pixel D
oTo D
q Transparent image matrix 4 be used to present stereo-picture, the unmodulated light of sweet spot unit penetrates this transparent image matrix.In order to simplify, observer's eyes 6 and one have only been expressed among the figure by reference point P
0To P
nThe optimum position of determining 5.
Fig. 2 illustrates the process that the backlight line is followed the trail of, and it represents the reference point P from the optimum position respectively
1To P
4Invest two pixel D that image array 4 is selected at random
rAnd D
pThe supposition opticpath, and corresponding four visual angle α
R1To α
R4And α
P1To α
P4
Fig. 3 a represents the sequence 7 of illumination component, and it comprises all address informations of the illumination component LE of the illumination matrix of being set up by control unit 1, and described illumination component sequence forms pattern M.The illumination component LE (seeing Fig. 3 b) that generates the optimum position of determining 5 will open according to above-mentioned pattern M.
Fig. 4 represents the light RT of the calculating of sending from the reference point of selecting at random
iAnd by the path of exemplary diffusion sheet SF with the scatteringangle scattering.Its illustrated when additional optical element have ± θ and ± during the angular range of θ/2,, how to open fill light element LE based on the scatteringangle on scattering or the diffraction instrument.The angular range ± θ here only detects in the horizontal direction.Usually, this process also can be finished in vertical direction.
Fig. 5 is the flow chart of the main treatment step of expression backlight line tracing program.
Described as main patent application, position, quantity and the scope of the optimum position 5 that generate can be controlled by control unit, and by means of by a plurality of illumination component LE
0nTo LE
QkThe illumination matrix of forming 1 realizes that this illumination component can be opened as shown in Figure 1 discretely.In described embodiment, illumination component LE is the monochromatic illumination element by the LCD of (not shown) illumination backlight.
Yet it can also be to be arranged in regular pattern, and LEDs, OLEDs that can discrete unlatching or similarly or the wire illumination component.
Imaging device is many parts assembly, and it is formed by the lens 2 of representing optical imaging system with as the Fresnel lens 3 of object lens, and wherein Fresnel lens projects optimum position 5 on observer's eyes 6.Selectively, imaging device can be lens 2.If desired, additional Optical devices can be incorporated in the imaging device, to improve the projection condition.It is possible replenishing the lens 2 that the lenticule by vertical arrangement constitutes with at least one lens that are made of horizontal lenticule.More the combination of poly-lens also is possible.Can use by the lens arra that is arranged in matrix or by the optical system that prism element constitutes and replace lens 2.
In another embodiment, imaging device can also comprise and be used for the rectification array that image field curvature is corrected.Type according to the image array 4 that uses can be provided with an additional retardation plate (retarder foil) in the optical projection path, to change polarisation of light.The illumination component LE of some distributes to each image-forming component all the time.
With reference to the vertical view among Fig. 1, an observer's eyes 6 are arranged in the space of watching in display the place ahead, more precisely, are arranged in the optimum position of expanding on given plane 5.At first, do not exist in 5 reality of optimum position, consider that just the system parameters and the condition of watching pre-determine it.The scope of optimum position is by reference point P
1To P
nExplanation.Reference point P
1To P
nCan also be arranged in arbitrary graphic pattern, comprise three-D pattern.Parameter n should be at least 4, thereby is formed for the rectangle that the backlight line is followed the trail of, in order to can realize clearly optimum position 5.In the present embodiment, n is 12.According to the precision of employed position detector and/or observer's eyes 6 position with respect to display, the degree of depth of optimum position 5 can be lower or bigger than shown here.Position detector work is more accurate, and the optimum position scope just can be littler.Point P
0Expression is by the detected eye position of position detector.If the observer is more than one, then detection of dynamic is watched the position of all eyes 6 in the space, and corresponding positional information is offered control unit is used for the backlight line and follows the trail of.
Continuously real-time test point P
0On the locus of observer's eyes 6 after, by means of the reference point P that disperses
1To P
nForm an imaginary optimum position 5 in around eyes.In control unit to from each reference point P
1To P
nPixel D in the row of the image array of selecting 4
0To D
qOpticpath RT
1To RT
nCalculate (see figure 1).Image array 4 is divided into the constant grid of spacing, and it forms the basis that pixel is calculated.Grid distance can or cannot be identical with the spacing of image array 4.Yet it also is possible using the grid of being made up of a plurality of zones with different spacing.Yet in the situation that the backlight line is followed the trail of, the spacing of use is more preferably greater than the spacing of image array, because this obviously reduces required computing capability.
Pixel D
0To D
qX coordinate by the row that it was arranged in is discerned.In fact, use the central series of image array, because the observer is willing to that more the center of purpose image display watches.Calculating another required parameter is visual angle α, under this visual angle, from reference point P
1To P
nLight get to the pixel D of grid
0To D
qOn.Empirical discovery approximately will use 4000 visual angle α could obtain to feel result of calculation.If the visual angle number is quite a lot ofly less than 4000, tracking accuracy will be received harmful effect so.
Under the situation of two-dimension imaging apparatus, pixel is not only limited by its x coordinate, is also limited by its x and y coordinate.
In the embodiment shown in fig. 1, illumination component LE
0nTo LE
QkBe monochromatic illumination element by the light valve (not shown) of back lighting.Observer's eyes 6 are positioned at reference point P
0On.By backlight line back tracking method calculate from external reference point P
kAnd P
nInvest external pixels D
0And D
qLight be shown among the figure.From reference point P
1Invest pixel D
pLight and visual angle α
P1Expression is got at light under this visual angle on the pixel of image array 4 together.
From pixel D
pOpticpath by image-forming component the illumination matrix 1 illumination component LE
P1Stop, described element preferably is arranged in the central series of image array 4.To all pixel D
0To D
qFinish this calculating with a large amount of visual angle α.This has guaranteed to obtaining reference point P
1To P
nThe even illumination of the optimum position 5 that forms and all illumination component LE that must open
0nTo LE
QkAll got to.The illumination component LE that is got to by light
0nTo LE
QkTo open with corresponding hurdle.
If illumination component LE
0nTo LE
QkOpen very few, optimum position 5 and the image of the connecting deficiency of will throwing light on.On the contrary, if illumination component LE
0nTo LE
QkOpen too much, the optimum position 5 another eyes that will throw light on extraly, thus cause crosstalking and the reduction of stereo-picture contrast.
The variation of the another kind of optimum position of determining is shown in Fig. 2.Can see that how light is from four reference point P in backlight line tracing process
1To P
4Invest two pixel D
rAnd D
pThereby, have different visual angle α respectively
R1To α
R4With
P1To α
P4Be in close proximity to position detector if the observer is positioned at, preferably use this optimum position structure, to determine observer's position by few reference point high accuracy.
Follow the trail of the result who produces as the input data from the reference point P of the optimum position 5 determined to the real-time backlight line of the pixel D of the grid of corresponding image array 4, be used for finding being stored in the precalculated data of look-up table (LUT).
Look-up table contains precalculated data record, and it has represented the result of calculation of a large amount of opticpaths of having finished according to same algorithm, and it calculates in real time and will or take a large amount of time.Why Here it is will arrive each the pixel D from the grid of image array 4 the illumination component LE of illumination matrix 1 by image-forming component the opticpath of two-dimensional coordinate calculate in advance, and is stored in the data record in the look-up table.
Yet it also is possible calculating the opticpath that arrives lens 2 in real time.This reduces the quantity of data record, thereby and has saved memory capacity.
The address information that relatively produces illumination component LE of the parameter in the control unit is calculated and be stored in to the parameter of the data record of calculating in advance with those in real time, and its scioptics 2 and Fresnel lens 3 project corresponding reference point P.Image-forming component can repeatedly be got to by the light of illusion, sequence 7 findings of the illumination component as shown in Fig. 3 a.Illumination component LE has been got to how many times in the backlight line tracing process that numeral in the sequence begins on reference point P.Yet the number of times of getting to when opening illumination component LE is also uncorrelated.Usually, the illumination component LE that is got at least once by light RT can be unlocked.Control unit generates the pattern M (seeing Fig. 3 b) that all illumination component LE opens illumination matrix 1 corresponding hurdle based on address information.Now, this pattern is used for realizing optimum position 5 in the position of determining for observer's eyes 6.
If a plurality of observers are arranged, determine order corresponding to the pattern M of the illumination component LE that will open of actual observation person's eyes number in display the place ahead.For example, if all observers want to watch identical content, at first can utilize backlight line back tracking method to provide required steric information to all left eyes, be all right eyes then.
If according to described backlight line back tracking method, a plurality of illumination component LE do not open, the stereo-picture that experience 5 position from the optimum position has above-mentioned shortcoming.For example, the blanking bar that single lenticular edge blank can be used as in the image is awared, and the illumination meeting of image array 4 is inhomogeneous.Verified, be preferably in extra consideration scattering of light or diffraction in the backlight line tracing process.
According to another embodiment of the present invention, having introduced can be the angle θ of the angle of scattering or the angle of diffraction.It detects in backlight line tracing process in the angular range of determining and considers.For simplicity, will describe by means of scattering device below the present invention.Yet, also can use scattering device similarly in the miscellaneous equipment.Imaging device is preferably in and distributes the scattering device with at least one dispersing element in the light path.Dispersing element can be the diffusion sheet SF with definite angle of scattering.It can be positioned at rear or the place ahead of Fresnel lens 3, or is arranged in other position of light path.If use a plurality of diffusion sheet SF, each diffusion sheet SF can have different angle of scatterings, and the additional parameter in the angular range can detect and consider like this, to find address information, as shown in Figure 4.This is used for the diffraction instrument and the angle of diffraction too similarly.
The present invention also comprise can be such possibility, promptly can detect and consider angular range in the horizontal and vertical directions, to seek additional address information.With reference to embodiment shown in Figure 4, it schematically illustrates as the scatteringangle of known diffusion sheet SF how and is the basis, determines the light RT that follows the trail of
iAngular range.The light RT that selects
iFrom reference point P at random, and pass image array 4 at pixel D.It is scattered sheet SF scattering, a large amount of like this light RT
I0To RT
I3(representing with arrow) invests the illumination component LE of illumination matrix 1
I-2To LE
I+2Follow the trail of if angular range ± θ is used for the backlight line, will open every one illumination component so.If angular range again divided by 2 (θ/2, as shown in Figure 3), illumination component LE
I-1And LE
I+1In the process that the backlight line is followed the trail of, also will be got to by light.Thereby can search the number of the illumination component LE that will open more accurately, its illumination uniformity to definite optimum position 5 has contribution, but also has further reduced the risk that illumination component LE does not open.In fact, the light number that additionally open is much bigger.
The angular range that will use also depends on the grid size of employed illumination matrix 1 under specific circumstances.
The size of illumination matrix 1 is more little, and based on the scattering or the angle of diffraction of reality, the angular range that is used for the tracking of backlight line is just determined more for a short time.But, it must be noted that angular range is more little, the address information of searching is just many more, and required computing time is also just many more.Here it is why when using backlight line back tracking method, and emphasis is used in considerable energy on device and the computing capability, and the good image quality and the illumination uniformity of the optimum position 5 that still can also obtain to determine.
Control unit will utilize the value of all a large amount of angular ranges that find to detect and consider address information.Address information also comprises visual angle α and corresponding to the angle θ or θ/2 of the angle of scattering or the angle of diffraction except the x coordinate.The address information of additionally searching has increased the accuracy of the minimal amount of the illumination component LE that will open that generates optimum position 5.
With reference to Fig. 5, the flow process of its expression backlight line tracing process, this flow process detects observer's eyes 6 positions from position detector, forms up to the pattern M of illumination component LE, to generate definite optimum position 5.
The invention still further relates to a kind of device, more particularly, relate to and a kind ofly comprise that the self-contained unit claim is described, the processor of the various functional units that are used to realize above-mentioned backlight line back tracking method.
The method that is used for the optimum position of tracking sweet spots unit of the present invention preferably provides a display, this display has the ability of determining the best pattern of illumination component with minimum data amount, to generate the optimum position on viewing plane, the observer is provided by information specific therein that provided by the image array that is evenly thrown light on all the time.Because in backlight line back tracking method, take into account not normal, so display only shows very little optical parallax best.
The use of look-up table has such advantage, promptly needn't recomputate the single illumination component that needs to generate the optimum position repeatedly.
Therefore, moving of person's eyes according to the observation, tracking sweet spots and corresponding stereo-picture exactly real-time, simultaneously, the person's that can increase the tracing observation scope.
The component labelling tabulation
The 1-lighting matrix
The 2-lens
The 3-Fresnel lens
The 4-image array
The 5-optimum position
6-observer eyes
7-illumination component sequence
The LE-illumination component
The D-pixel
The M-pattern
The P-reference point
RT-light
The SF-diffusion sheet
α-visual angle
θ-angle (angle of scattering or the angle of diffraction)
Claims (17)
1. method that is used for the optimum position of tracking scope sweet spot unit, wherein
Sweet spot unit comprises the illumination matrix with a plurality of controllable lighting elements, and imaging device is used for directional light is projected at least one observer's eyes in the mode of optimum position, and described light is modulated with image information by the pixel of image array; And wherein
Position detector detects observer's eye position information that will be sent to control unit, and this control unit utilizes positional information to open the illumination component that is used for the optimum position, it is characterized in that control unit
-determine reference point (P by means of positional information
0... P
n), described reference point is in the optimum position (5) that each observer's eye (6) has been determined to expand on every side,
-be the selected pixel (D of image array (4)
0To D
q) carry out the tracking of backlight line, it starts from each reference point (P
0... P
n), by these pixels (D
0To D
q) and imaging device, arrive illumination matrix (1), to open the illumination component (LE that generates definite optimum position (5) with imaging device
0nTo LE
Qk).
2. method according to claim 1 is characterized in that, selected pixel (D
0To D
q) be distributed on the entire image matrix (4), optimum position (5) are directed to the large area region of the bright image array of illumination (4) of observer's eyes (6) like this.
3. method according to claim 1 is characterized in that, the geometry of optimum position (5) by control unit according to the position, preferably the distance between observer's eyes (6) and the display is determined.
4. method according to claim 1 is characterized in that, from reference point (P
0... P
n) to pixel (D
0To D
q) opticpath determine that by visual angle α this α is to each pixel (D
0To D
q) get a large amount of values.
5. method according to claim 1 is characterized in that, the control unit that is used to search address information also detects and considers angle (θ) in the angular range, the optical characteristics of described angle (θ) decision scattering or diffraction instrument.
6. method according to claim 5 is characterized in that, angle (θ) is the angle of scattering that comprises the scattering device (SF) of at least one dispersing element, or comprises the angle of diffraction of the diffraction instrument of at least one diffraction element.
7. method according to claim 5 is characterized in that, the angular range relevant with angle θ is incorporated in the step of searching address information, and this step does not rely on scattering device or diffraction instrument residing position in light path.
8. method according to claim 5 is characterized in that, control unit is searched angular range according to the grid size of used illumination matrix (1).
9. method according to claim 1 is characterized in that, wherein from each reference point (P of image array (4)
0... P
n) to the illumination matrix (1) each illumination component (LE
0nTo LE
Qk) opticpath through calculating in advance and being stored in the look-up table with the form of translation data record.
10. method according to claim 9 is characterized in that, carries out the comparison of electronic parameter in look-up table, to generate each illumination component (LE
0nTo LE
Qk) address information, this address information is to the reference point (P of optimum position
0... P
n) imaging.
11., it is characterized in that the angular range relevant with the angle θ that determines is also contained in the precalculated data record that is stored in the look-up table according to claim 7 and 9 described methods.
12. method according to claim 10 is characterized in that, address information comprise separately be respectively applied for all observer's left eyes and the illumination component (LE of all right eyes
0nTo LE
Qk) sequence, wherein all eyes are shown same information.
13. method according to claim 10 is characterized in that, opens all illumination component (LE that find out in backlight line tracing process of illumination matrix (1) at least
0nTo LE
Qk), to generate definite optimum position (5).
14. be used to control the device of display sweet spot unit, it has image array and pixel, illumination matrix with illumination component, and have and be used for light is projected imaging device on observer's eyes of optimum position, has the position detector that is used to detect observer's eye position, and have the address information of providing to open the control unit of specific illumination element, it is characterized in that this device comprises
-control unit is in order to determine the reference point (P of optimum position (5)
0To P
n), and from reference point (P
0To P
n) by the pixel (D in the grid given on the image array (4)
0To D
q) and imaging device, arrive illumination component (LE
0nTo LE
Qk) carry out the tracking of backlight line, be used for illumination component (LE to search
0nTo LE
Qk) be imaged onto corresponding reference point (P
0To P
n) on address information, and generate the illumination component (LE of the unlatching be used to throw definite optimum position (5)
0nTo LE
Qk) pattern (M), and
-be used for the precalculated data record that is used for opticpath is stored in look-up table and execution parameter relatively to generate illumination component (LE
0nTo LE
Qk) the storage device of address information, the pixel (D of this opticpath from determining
0To D
q), arrive illumination component (LE by imaging device
0nTo LE
Qk),
15. device according to claim 14 is characterized in that, the definite illumination component (LE that will additionally open of the optical characteristics of scattering or diffraction instrument
0nTo LE
Qk) extra address information.
16. device according to claim 14 is characterized in that, illumination matrix (1) is for being combined with the light valve of directional backlight.
17. device according to claim 14 is characterized in that, illumination matrix (1) is by luminous lighting element (LE that can discrete unlatching
0nTo LE
Qk) form.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005010250.6 | 2005-02-25 | ||
| DE102005010250A DE102005010250B4 (en) | 2005-02-25 | 2005-02-25 | Method and device for tracking sweet spots |
| DE102005040597.5 | 2005-08-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101129074A true CN101129074A (en) | 2008-02-20 |
| CN100576933C CN100576933C (en) | 2009-12-30 |
Family
ID=36848190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200680006173A Expired - Fee Related CN100576933C (en) | 2005-02-25 | 2006-02-24 | The method of tracking sweet spots, device and automatic stereoscopic display device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100576933C (en) |
| DE (1) | DE102005010250B4 (en) |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105637320A (en) * | 2013-08-19 | 2016-06-01 | 巴斯夫欧洲公司 | Optical detector |
| CN106576161A (en) * | 2014-06-25 | 2017-04-19 | 夏普株式会社 | Variable barrier pitch correction |
| CN108345122A (en) * | 2018-01-29 | 2018-07-31 | 中山大学 | A kind of determining bore hole 3D display vision area corresponds to the method and system of backlight |
| US10094927B2 (en) | 2014-09-29 | 2018-10-09 | Basf Se | Detector for optically determining a position of at least one object |
| US10120078B2 (en) | 2012-12-19 | 2018-11-06 | Basf Se | Detector having a transversal optical sensor and a longitudinal optical sensor |
| US10353049B2 (en) | 2013-06-13 | 2019-07-16 | Basf Se | Detector for optically detecting an orientation of at least one object |
| US10412283B2 (en) | 2015-09-14 | 2019-09-10 | Trinamix Gmbh | Dual aperture 3D camera and method using differing aperture areas |
| CN110459026A (en) * | 2019-06-04 | 2019-11-15 | 恒大智慧科技有限公司 | Specific people's tracking positioning method, platform, server and storage medium |
| CN111308698A (en) * | 2020-02-14 | 2020-06-19 | 浙江大学 | Directional display screen, induction type three-dimensional display device and display method thereof |
| US10775505B2 (en) | 2015-01-30 | 2020-09-15 | Trinamix Gmbh | Detector for an optical detection of at least one object |
| US10823818B2 (en) | 2013-06-13 | 2020-11-03 | Basf Se | Detector for optically detecting at least one object |
| US10890491B2 (en) | 2016-10-25 | 2021-01-12 | Trinamix Gmbh | Optical detector for an optical detection |
| US10948567B2 (en) | 2016-11-17 | 2021-03-16 | Trinamix Gmbh | Detector for optically detecting at least one object |
| US10955936B2 (en) | 2015-07-17 | 2021-03-23 | Trinamix Gmbh | Detector for optically detecting at least one object |
| US11041718B2 (en) | 2014-07-08 | 2021-06-22 | Basf Se | Detector for determining a position of at least one object |
| US11125880B2 (en) | 2014-12-09 | 2021-09-21 | Basf Se | Optical detector |
| US11211513B2 (en) | 2016-07-29 | 2021-12-28 | Trinamix Gmbh | Optical sensor and detector for an optical detection |
| US11428787B2 (en) | 2016-10-25 | 2022-08-30 | Trinamix Gmbh | Detector for an optical detection of at least one object |
| US11860292B2 (en) | 2016-11-17 | 2024-01-02 | Trinamix Gmbh | Detector and methods for authenticating at least one object |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007043149B4 (en) * | 2007-09-03 | 2016-09-29 | Seereal Technologies S.A. | Method and device for transmitting holographic video data |
| DE102014003351B4 (en) * | 2014-03-07 | 2022-11-03 | Dioptic Gmbh | Head-up display and display method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8716369D0 (en) * | 1987-07-10 | 1987-08-19 | Travis A R L | Three-dimensional display device |
| GB2363273A (en) * | 2000-06-09 | 2001-12-12 | Secr Defence | Computation time reduction for three dimensional displays |
-
2005
- 2005-02-25 DE DE102005010250A patent/DE102005010250B4/en not_active Expired - Fee Related
-
2006
- 2006-02-24 CN CN200680006173A patent/CN100576933C/en not_active Expired - Fee Related
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10120078B2 (en) | 2012-12-19 | 2018-11-06 | Basf Se | Detector having a transversal optical sensor and a longitudinal optical sensor |
| US10823818B2 (en) | 2013-06-13 | 2020-11-03 | Basf Se | Detector for optically detecting at least one object |
| US10845459B2 (en) | 2013-06-13 | 2020-11-24 | Basf Se | Detector for optically detecting at least one object |
| US10353049B2 (en) | 2013-06-13 | 2019-07-16 | Basf Se | Detector for optically detecting an orientation of at least one object |
| US10012532B2 (en) | 2013-08-19 | 2018-07-03 | Basf Se | Optical detector |
| CN105637320A (en) * | 2013-08-19 | 2016-06-01 | 巴斯夫欧洲公司 | Optical detector |
| CN106576161A (en) * | 2014-06-25 | 2017-04-19 | 夏普株式会社 | Variable barrier pitch correction |
| US11041718B2 (en) | 2014-07-08 | 2021-06-22 | Basf Se | Detector for determining a position of at least one object |
| US10094927B2 (en) | 2014-09-29 | 2018-10-09 | Basf Se | Detector for optically determining a position of at least one object |
| US11125880B2 (en) | 2014-12-09 | 2021-09-21 | Basf Se | Optical detector |
| US10775505B2 (en) | 2015-01-30 | 2020-09-15 | Trinamix Gmbh | Detector for an optical detection of at least one object |
| US10955936B2 (en) | 2015-07-17 | 2021-03-23 | Trinamix Gmbh | Detector for optically detecting at least one object |
| US10412283B2 (en) | 2015-09-14 | 2019-09-10 | Trinamix Gmbh | Dual aperture 3D camera and method using differing aperture areas |
| US11211513B2 (en) | 2016-07-29 | 2021-12-28 | Trinamix Gmbh | Optical sensor and detector for an optical detection |
| US10890491B2 (en) | 2016-10-25 | 2021-01-12 | Trinamix Gmbh | Optical detector for an optical detection |
| US11428787B2 (en) | 2016-10-25 | 2022-08-30 | Trinamix Gmbh | Detector for an optical detection of at least one object |
| US10948567B2 (en) | 2016-11-17 | 2021-03-16 | Trinamix Gmbh | Detector for optically detecting at least one object |
| US11415661B2 (en) | 2016-11-17 | 2022-08-16 | Trinamix Gmbh | Detector for optically detecting at least one object |
| US11635486B2 (en) | 2016-11-17 | 2023-04-25 | Trinamix Gmbh | Detector for optically detecting at least one object |
| US11698435B2 (en) | 2016-11-17 | 2023-07-11 | Trinamix Gmbh | Detector for optically detecting at least one object |
| US11860292B2 (en) | 2016-11-17 | 2024-01-02 | Trinamix Gmbh | Detector and methods for authenticating at least one object |
| CN108345122A (en) * | 2018-01-29 | 2018-07-31 | 中山大学 | A kind of determining bore hole 3D display vision area corresponds to the method and system of backlight |
| CN108345122B (en) * | 2018-01-29 | 2019-10-22 | 中山大学 | A kind of determining naked eye 3D display vision area corresponds to the method and system of backlight |
| CN110459026A (en) * | 2019-06-04 | 2019-11-15 | 恒大智慧科技有限公司 | Specific people's tracking positioning method, platform, server and storage medium |
| CN111308698A (en) * | 2020-02-14 | 2020-06-19 | 浙江大学 | Directional display screen, induction type three-dimensional display device and display method thereof |
| CN111308698B (en) * | 2020-02-14 | 2021-06-29 | 浙江大学 | Directional display screen, induction type three-dimensional display device and display method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102005010250A1 (en) | 2006-09-07 |
| CN100576933C (en) | 2009-12-30 |
| DE102005010250B4 (en) | 2007-02-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100576933C (en) | The method of tracking sweet spots, device and automatic stereoscopic display device | |
| US20080246753A1 (en) | Method and Device for Tracking Sweet Spots | |
| US10685492B2 (en) | Switchable virtual reality and augmented/mixed reality display device, and light field methods | |
| FI113987B (en) | Screen Events | |
| US6717728B2 (en) | System and method for visualization of stereo and multi aspect images | |
| EP0687366B1 (en) | Method and apparatus for image alignment | |
| CN110476148B (en) | Display system and method for providing multi-view content | |
| JP4937424B1 (en) | Stereoscopic image display apparatus and method | |
| US20040223218A1 (en) | Visualization of three dimensional images and multi aspect imaging | |
| US20040227992A1 (en) | Three-dimensional free space image projection employing Fresnel lenses | |
| CN101558655A (en) | Three dimensional projection display | |
| US20030122828A1 (en) | Projection of three-dimensional images | |
| CN108628087B (en) | Projection device and space imaging method | |
| KR101663672B1 (en) | Wide viewing angle naked eye 3d image display method and display device | |
| US20110216407A1 (en) | Lighting device for an autostereoscopic display | |
| JP2001078234A (en) | Image input device and image display device | |
| JP2005515487A (en) | 3D image projection using retroreflective screen | |
| JP2004537933A (en) | Autostereoscopic image display system equipped with a person tracking system | |
| CN109997070A (en) | Near-eye display system including modulating lamination | |
| CN108881880A (en) | Naked eye 3D display method, apparatus, equipment and storage medium based on tracing of human eye | |
| KR20060096596A (en) | Three-dimensional/ two-dimensional convertible display device | |
| CN108633331A (en) | The generation of image for automatic stereoscopic display device | |
| US10819975B2 (en) | System and method for displaying a 2 point sight autostereoscopic image on an nos point self-esistical display screen and processing display control on such display screen | |
| WO2022105095A1 (en) | 3d display apparatus for light field and driving method therefor | |
| JPH0634343A (en) | Multiple view point three-dimensional image input device, image synthesizing device, and image output device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091230 Termination date: 20140224 |